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Wiki source code of LX3V-2WT

Version 4.1 by Stone Wu on 2022/06/22 14:58
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1 = **1 Operating principle** =
2
3 Electrical resistance of metal material changes in proportion to the forces being applied to deform it. The strain gauge measures the deformation as a change in electrical resistance, which is a measure of the strain and hence the applied forces (load).
4
5 = **2 Introduction** =
6
7 1. WECON LX3V-2WT expansion module’s resolution is 24-bit. The module can be used for reading signals from 4- or 6- wire configuration; The response speed can be adjusted to meet customer needs, easily meeting the full range of needs in the current load application market.
8 1. To ensure proper installation and operation of this product, please read the instruction manual carefully before using the module. This manual is intended only as an operating guide and introductory reference for the LX3V-2WT.
9 1. The LX3V-2WT weighing module can read and write data through the LX3V host program with the instruction FROM/TO.
10
11 **✎Note:** Disconnect power before installing/removing modules or wiring the modules to avoid contact or product damage.
12
13 == **Specification** ==
14
15 |(% style="width:225px" %)**Item**|(% style="width:850px" %)**Description**
16 |(% style="width:225px" %)Channel|(% style="width:850px" %)Dual channel
17 |(% style="width:225px" %)A/D converter|(% style="width:850px" %)24 bit Δˉ∑ A/D
18 |(% style="width:225px" %)Resolution|(% style="width:850px" %)24 bit (signed)
19 |(% style="width:225px" %)Speed|(% style="width:850px" %)7.5/10/25/50/60/150/300Hz available
20 |(% style="width:225px" %)Polarity|(% style="width:850px" %)Unipolar and bipolar
21 |(% style="width:225px" %)Non-linearity|(% style="width:850px" %)≤0.01% full scale(25^^o^^C)
22 |(% style="width:225px" %)Zero drift|(% style="width:850px" %)≤0.2μV/^^ o^^C
23 |(% style="width:225px" %)Gain drift|(% style="width:850px" %)≤10ppm/^^ o^^C
24 |(% style="width:225px" %)Excitation voltage/ load|(% style="width:850px" %)Dual 5V, single load impedance not less than 200 Ω
25 |(% style="width:225px" %)Sensor sensitivity|(% style="width:850px" %)1mV/V to 15mV/V
26 |(% style="width:225px" %)Isolation|(% style="width:850px" %)Transformer (power supply) and the optical coupler (signal)
27 |(% style="width:225px" %)Indicator light|(% style="width:850px" %)Module power supply (24V) light, module internal data communication light (COM), communication indicator between PLC and module (LINK), channel indicator light and channel calibration light
28 |(% style="width:225px" %)Power supply|(% style="width:850px" %)24V±20% 2VA
29 |(% style="width:225px" %)Operating temperature|(% style="width:850px" %)0 to 60^^ o^^C
30 |(% style="width:225px" %)Storage temperature|(% style="width:850px" %)-20 to 80^^ o^^C
31 |(% style="width:225px" %)Dimension|(% style="width:850px" %)90(L)x58(W)x80(H) mm
32
33 == **Valid bits** ==
34
35 Refer to sampling frequency in BFM description, Chapter 5 of this manual.
36
37 = **3 Dimensions** =
38
39 == **Dimensions** ==
40
41 [[image:图片1.jpg||height="358" width="301"]] [[image:图片2.jpg||height="365" width="351"]]
42
43 (% style="text-align:center" %)
44 [[image:图片3.jpg||height="593" width="684"]]
45
46 1. Extension cable
47 1. COM light: Module internal data communication indicator
48 1. 24V light: Always on when connected to external 24V power supply
49 1. WT light: Channel input/output indicator
50
51 * WE light: Channel calibration indicator
52
53 (% start="5" %)
54 1. LINK: Communication indicator between PLC and module (LINK)
55 1. Expansion module name
56 1. Expansion module interface
57 1. DIN rail mounting clip
58 1. Hook for DIN rail
59 1. Holes for direct mounting: 2 places (φ4.5)
60
61 |(% style="width:121px" %)**Name**|(% style="width:346px" %)**Description**|(% style="width:126px" %)**Light status**|(% style="width:483px" %)**Event status**
62 |(% rowspan="3" style="width:121px" %)(((
63
64
65 LINK light
66 )))|(% rowspan="3" style="width:346px" %)Communication indicator between PLC and module|(% style="width:126px" %)Light flashes|(% style="width:483px" %)Data is interacting normally (communication is normal)
67 |(% style="width:126px" %)Lights off|(% style="width:483px" %)Data interaction is abnormal, stopped or failed
68 |(% style="width:126px" %)Always ON|(% style="width:483px" %)Abnormal software operation or hardware failure
69 |(% rowspan="3" style="width:121px" %)(((
70
71
72 COM light
73 )))|(% rowspan="3" style="width:346px" %)Module internal data communication indicator|(% style="width:126px" %)Light flashes|(% style="width:483px" %)Data is interacting normally (communication is normal)
74 |(% style="width:126px" %)Lights off|(% style="width:483px" %)Data interaction is abnormal, stopped or failed
75 |(% style="width:126px" %)Always ON|(% style="width:483px" %)Abnormal software operation or hardware failure
76 |(% rowspan="3" style="width:121px" %)(((
77
78
79 WT light
80 )))|(% rowspan="3" style="width:346px" %)Channel output/input indicator|(% style="width:126px" %)Light flashes|(% style="width:483px" %)Analog input is out of range
81 |(% style="width:126px" %)Always ON|(% style="width:483px" %)Analog input is within the range
82 |(% style="width:126px" %)Lights off|(% style="width:483px" %)Channel closed
83 |(% rowspan="2" style="width:121px" %)WE light|(% rowspan="2" style="width:346px" %)Calibration indicator for the channel|(% style="width:126px" %)Lights off|(% style="width:483px" %)Calibration succeeded
84 |(% style="width:126px" %)Always ON|(% style="width:483px" %)Calibration failed or not calibrated
85
86 == Use of blade terminals ==
87
88 (% style="text-align:center" %)
89 [[image:image-20220622145005-4.jpeg||height="220" width="366"]]
90
91 Use crimp terminals of the size shown in the figure. Terminal tightening torque is 0.5 to 0.8N.m. Be sure to tighten the screws so as not to cause malfunction.
92
93 == **Terminals** ==
94
95 |**Terminal**|**Terminal Instructions**
96 |24V+|External DC24 power supply+
97 |24V-|External DC24 power supply-
98 |Ground|Ground
99 |FG1|Sensor housing
100 |E1+|First sensor 5V power +
101 |E1-|First sensor 5V power -
102 |F1+|First sensor power supply feedback +
103 |F1-|First sensor power supply feedback -
104 |S1+|First sensor signal output +
105 |S1-|First sensor signal output -
106 |E2+|Second sensor 5V power +
107 |E2-|Second sensor 5V power -
108 |F2+|Second sensor power supply feedback +
109 |F2-|Second sensor power supply feedback -
110 |S2+|Second sensor signal output +
111 |S2-|Second sensor signal output -
112 |FG2|Second sensor housing
113 |Other empty terminals|Empty pin, not connect any wires
114
115 = **4 Wiring ** =
116
117 (% style="text-align:center" %)
118 [[image:image-20220622145005-5.jpeg||height="522" width="706"]]
119
120 **✎Note:**
121
122 * Impedance of the weighing sensor is greater than 200 Ω.
123 * Sensors with 4 wires need to have E1+ and F1+ connected, E1- and F1- connected.
124
125 = **5 Buffer register (BFM)** =
126
127 == **BFM list** ==
128
129 |(% colspan="2" %)**BFM number**|(% rowspan="2" %)**Power-off hold**|(% rowspan="2" %)(((
130 **Read/**
131
132 **write**
133 )))|(% rowspan="2" style="width:189px" %)**Register name**|(% rowspan="2" style="width:74px" %)**Default**|(% rowspan="2" style="width:128px" %)**Range**|(% rowspan="2" style="width:466px" %)**Illustrate**
134 |**CH1**|**CH2**
135 |(% colspan="2" %)#0|O|R|(% style="width:189px" %)Model type|(% style="width:74px" %)5012|(% style="width:128px" %)-|(% style="width:466px" %)System default, the model number of LX3V-2WT
136 |(% colspan="2" %)#1|O|R|(% style="width:189px" %)Software version|(% style="width:74px" %)15004|(% style="width:128px" %)-|(% style="width:466px" %)Software version number
137 |#2|#42|O|R/W|(% style="width:189px" %)Unipolar/Bipolar|(% style="width:74px" %)0|(% style="width:128px" %)0 to 1|(% style="width:466px" %)0: Bipolar 1: Unipolar
138 |#3|#43|O|R/W|(% style="width:189px" %)Sampling frequency|(% style="width:74px" %)1|(% style="width:128px" %)0 to 4800|(% style="width:466px" %)(((
139 0: 7.5HZ
140
141 1: 10HZ
142
143 2: 25HZ
144
145 3: 50HZ
146
147 4: 60HZ
148
149 5: 150HZ
150
151 6: 300HZ
152
153 7: 600HZ
154
155 8: 960HZ
156
157 9: 2400HZ
158
159 10 to 4800: 10Hz to 4800Hz
160 )))
161 |#4|#44|X|R|(% style="width:189px" %)Status code|(% style="width:74px" %)0|(% style="width:128px" %)-|(% style="width:466px" %)For details of each status code, refer to "Buffer Register BFM Description"
162 |#5|#45|X|R|(% style="width:189px" %)Error code|(% style="width:74px" %)0|(% style="width:128px" %)—|(% style="width:466px" %)(((
163 A data register that stores all error states. Each error state is determined by the corresponding bit. It is possible to generate more than two error states at the same time. 0 means normal without error, 1 means there is an error state.
164
165 #45: Reserved
166
167 b0: Abnormal power supply
168
169 b1: Hardware failure
170
171 b2: CH1 conversion error
172
173 b3: CH2 conversion error
174
175 b4: CH1 input calibration parameter error
176
177 b5: CH2 input calibration parameter error
178
179 Others: Reserved
180 )))
181 |#6|#46|X|R/W|(% style="width:189px" %)Tare reading|(% style="width:74px" %)0|(% style="width:128px" %)0 to 1|(% style="width:466px" %)(((
182 Read the current average value as the tare weight value.
183
184 0: Normal (invalid).
185
186 1: Execute tare setting, then reset to 0.
187
188 Others: Invalid.
189 )))
190 |#7|#47|O|R/W|(% style="width:189px" %)(((
191 Gross weight/ net weigh
192
193 display
194 )))|(% style="width:74px" %)0|(% style="width:128px" %)-|(% style="width:466px" %)(((
195 Choose to display the current weight as gross weight (K0) or net weight (K1).
196
197 0: display gross weight.
198
199 1: display net weight.
200
201 0xF: Channel closed
202 )))
203 |#8|#48|X|R/W|(% style="width:189px" %)Calibration|(% style="width:74px" %)0|(% style="width:128px" %)-|(% style="width:466px" %)(((
204 The calibration is to make the module match the weight value of the load cell of the weighing module. The default value is 0.
205
206 0x0001: CHI zero instruction.
207
208 0x0002: CH1 weight base point instruction.
209
210 0x0003: CH1 no weight calibration instruction. (supported by 15004 and above)
211
212 0x0004: CH1 modify calibration parameter instruction. (supported by version 15004 and above)
213
214 **✎Note: **When a value is written to BFM#8 or BFM#48 using the device monitor, it is automatically reset to 0.
215 )))
216 |#9|#49|X|R/W|(% style="width:189px" %)Reset|(% style="width:74px" %)0|(% style="width:128px" %)0 to 3|(% style="width:466px" %)(((
217 #49: Reserved
218
219 1: Reset CH1
220
221 2: Reset CH2
222
223 3: Reset all channels
224
225 Others: no action
226 )))
227 |#10|#50|O|R/W|(% style="width:189px" %)Filtering method|(% style="width:74px" %)0|(% style="width:128px" %)0 to 1|(% style="width:466px" %)Recalibration required after change
228 |#11|#51|O|R/W|(% style="width:189px" %)Filter strength|(% style="width:74px" %)0|(% style="width:128px" %)0 to 7|(% style="width:466px" %)Recalibration required after change
229 |#12|#52|O|R/W|(% style="width:189px" %)Zero tracking intervals|(% style="width:74px" %)0|(% style="width:128px" %)0 to 20000|(% style="width:466px" %)When the zero tracking function is enabled, the minimum interval between two consecutive zero resets. The unit is 1ms.
230 |#13|#53|O|R/W|(% style="width:189px" %)Zero tracking range|(% style="width:74px" %)0|(% style="width:128px" %)0 to 100|(% style="width:466px" %)(((
231 0: Disable the zero tracking function
232
233 Others: Set the zero tracking range (absolute value)
234 )))
235 |#14|#54|O|R/W|(% style="width:189px" %)Automatically reset after boot|(% style="width:74px" %)0|(% style="width:128px" %)0 to 4|(% style="width:466px" %)(((
236 0: Disable automatic reset at startup
237
238 1: ±2%MAX
239
240 2: ±5%MAX
241
242 3: ±10%MAX
243
244 4: ±20%MAX
245 )))
246 |#15|#55|O|R/W|(% style="width:189px" %)Sensor sensitivity setting (inside the module)|(% style="width:74px" %)4|(% style="width:128px" %)0 to 5|(% style="width:466px" %)(((
247 0:<1V/V
248
249 1:<125mV/V
250
251 2:<62.5mV/V
252
253 3:<31.25V/V
254
255 4:<15.625mV/V
256
257 5:<7.812mV/V
258
259 **✎Note:** Recalibration is required after setting. (Only supported by version 13904 and above)
260 )))
261 |#16|#56|(% rowspan="2" %)(((
262
263
264 X
265 )))|(% rowspan="2" %)(((
266
267
268 R
269 )))|(% style="width:189px" %)Average weight L|(% style="width:74px" %)0|(% rowspan="2" style="width:128px" %)(((
270 -2147483648 to
271
272 2147483647
273 )))|(% style="width:466px" %)(((
274 Average weight display value
275
276 (low word)
277 )))
278 |#17|#57|(% style="width:189px" %)Average weight H|(% style="width:74px" %)0|(% style="width:466px" %)(((
279 Average weight display value
280
281 (high word)
282 )))
283 |#18|#58|O|R/W|(% style="width:189px" %)Sliding average|(% style="width:74px" %)5|(% style="width:128px" %)1 to 50|(% style="width:466px" %)(((
284 The setting range is K1 to K50, and the default value is K5.
285
286 When the set value exceeds the range, it is automatically changed to the critical value K1 or K50.
287 )))
288 |#19|#59|(% rowspan="2" %)O|R/W|(% style="width:189px" %)Tare weight value L|(% rowspan="2" style="width:74px" %)0|(% rowspan="2" style="width:128px" %)(((
289 -2147483648 to
290
291 2147483647
292 )))|(% rowspan="2" style="width:466px" %)You could write or read the tare weight #7 by instruction.
293 |#20|#60|R/W|(% style="width:189px" %)Tare weight value H
294 |#21|#61|O|R/W|(% style="width:189px" %)CH1 Stability check time|(% style="width:74px" %)200|(% style="width:128px" %)0 to 20000|(% style="width:466px" %)Stability check time, used in conjunction with the stability check range. Unit: ms.
295 |#22|#62|O|R/W|(% style="width:189px" %)Stability check range|(% style="width:74px" %)1|(% style="width:128px" %)1 to 100|(% style="width:466px" %)If the stability check range is set to 100 and the stability check time is set to 200ms, the value is considered to be stable if the current weight bounce range is within 100 for 200ms. In other cases, it is considered unstable, and the stability flag is displayed in BFM#4.
296 |#23|#63|(% rowspan="2" %)O|R/W|(% style="width:189px" %)(((
297 Weight value
298
299 calibration L
300 )))|(% rowspan="2" style="width:74px" %)1000|(% rowspan="2" style="width:128px" %)(((
301 -2147483648 to
302
303 2147483647
304 )))|(% rowspan="2" style="width:466px" %)(((
305 Input weight base point weight with calibration weight
306
307 Input sensor range without calibration weight
308 )))
309 |#24|#64|R/W|(% style="width:189px" %)(((
310 Weight value
311
312 calibration H
313 )))
314 |#25|#65|(% rowspan="2" %)O|R/W|(% style="width:189px" %)Weight upper limit L|(% rowspan="2" style="width:74px" %)32767|(% rowspan="2" style="width:128px" %)(((
315 -2147483648 to
316
317 2147483647
318 )))|(% rowspan="2" style="width:466px" %)You could set the maximum weight value. When the measured value exceeds the set value, an error code will be recorded.
319 |#26|#66|R/W|(% style="width:189px" %)Weight upper limit H
320 |#27|#67|(% rowspan="2" %)O|R/W|(% style="width:189px" %)Zero judgment check upper limit L|(% rowspan="2" style="width:74px" %)10|(% rowspan="2" style="width:128px" %)(((
321 -2147483648 to
322
323 2147483647
324 )))|(% rowspan="4" style="width:466px" %)(((
325 Zero point judgment function:
326
327 You could use the zero point judgment function to know that the item has been removed from the weighing module. You could judges that the measurement value is stable and the Bit is 1, which means that the item has been removed from the weighing module, and you could perform the next step at this time. (The zero point weight Bit in the zero point judgment range is 1)
328 )))
329 |#28|#68|R/W|(% style="width:189px" %)Zero judgment check upper limit H
330 |#29|#69|(% rowspan="2" %)O|R/W|(% style="width:189px" %)Zero judgment checklower limit L|(% rowspan="2" style="width:74px" %)-10|(% rowspan="2" style="width:128px" %)(((
331 -2147483648 to
332
333 2147483647
334 )))
335 |#30|#70|R/W|(% style="width:189px" %)Zero judgment check lower limit H
336 |#31|#71|X|R/W|(% style="width:189px" %)Additional function options|(% style="width:74px" %)0|(% style="width:128px" %)0 to 1|(% style="width:466px" %)(((
337 0: Default value. Additional functions are not enabled
338
339 1: Enable filter reset function.
340
341 Others: Reserved
342 )))
343 |#32|#72|X|R/W|(% style="width:189px" %)(((
344 Additional functions
345
346 Parameter 1
347 )))|(% style="width:74px" %)0|(% style="width:128px" %)0 to 100|(% style="width:466px" %)(((
348 Enable filter reset function:
349
350 0: The default value does not work
351
352 0 to 100: The number of sampling cycles to wait to restart filtering. The values collected during the period are accumulated and averaged as the initial value of filtering.
353 )))
354 |#33|#73|X|R|(% style="width:189px" %)Digital value L|(% rowspan="2" style="width:74px" %)0|(% rowspan="2" style="width:128px" %)-|(% rowspan="2" style="width:466px" %)Digital quantity collected by ADC
355 |#34|#74|X|R|(% style="width:189px" %)Digital value H
356 |#35|#75|(% rowspan="2" %)O|(% rowspan="2" %)R/W|(% rowspan="2" style="width:189px" %)Calibration parameter A|(% rowspan="2" style="width:74px" %)1|(% rowspan="2" style="width:128px" %)(((
357 -3.402823E+38
358
359 to 3.402823E+38
360 )))|(% rowspan="4" style="width:466px" %)Described in CH1:
361 After modifying the calibration parameters, #8 does not write 4, it is only displayed, and not used for weight value calculation, and will not be saved when power off. After #8 is written to 4, if the parameter range is correct, write and save it for weight value calculation, # 4 error code Bit4 is set to 0. If the parameter range is wrong, no write operation is performed, and #4 error code Bit4 is set to 1.
362 |#36|#76
363 |#37|#77|(% rowspan="2" %)O|(% rowspan="2" %)R/W|(% rowspan="2" style="width:189px" %)Calibration parameter B|(% rowspan="2" style="width:74px" %)0|(% rowspan="2" style="width:128px" %)(((
364 -3.402823E+38
365
366 to 3.402823E+38
367 )))
368 |#38|#78
369 |#39|#79|O|R/W|(% style="width:189px" %)Sensor sensitivity (specification)|(% style="width:74px" %)2000|(% style="width:128px" %)0 to 32767|(% style="width:466px" %)The default setting of 2000 means 2mV/V. For calibration without weights, you need to set the sensitivity and accuracy of the sensor. The sensitivity range is 0 to 32.767mV/V, the sensor sensitivity BFM#39 input negative value, directly convert it to 32767 and execute.
370 For example: Modified to 1942 represent 1.942mV/V.
371 |#40|#80|X|R/W|(% style="width:189px" %)Sensor feedback voltage L|(% style="width:74px" %)0|(% style="width:128px" %)-|(% style="width:466px" %)(((
372 Write:
373
374 0: not displayed
375
376 1: Display the current sensor feedback voltage in real time
377
378 2: Display the zero-point voltage during calibration
379
380 3: Display the voltage reading of the applied weight during calibration:
381
382 Displays the low bit of the voltage value. Unit: uV.
383 )))
384 |#41|#81|X|R|(% style="width:189px" %)(((
385 Sensor feedback
386
387 voltage H
388 )))|(% style="width:74px" %)0|(% style="width:128px" %)-|(% style="width:466px" %)Read: Displays the low bit of the voltage value. Unit: uV.
389
390 **✎Note:**
391
392 * O means retentive type.
393 * X means non-retentive type.
394 * R means readable data.
395 * W means writable data.
396
397 == **BFM description** ==
398
399 **BFM0: Module code**
400
401 LX3V-2WT model code: 5012
402
403 **BFM1: module version**
404
405 The software version is displayed in decimal, which is used to indicate the software version of the expansion module.
406
407 **BFM2: Polarity**
408
409 For bipolar, the signal will go through zero while it is in changing process, but unipolar will not. The result of the conversion from analog value to digital value is signed, so for bipolar signal the value could be minus.
410
411 **BFM3: Sampling frequency**
412
413 The frequency of input signal reading, the lower the frequency is, the more stable the value it gets, and the higher the precision is, but the lower speed gets.
414
415 |**Setting**|**Sample frequency (HZ)**|**Sample precision (Bits)**|**Setting**|**Sample frequency (HZ)**|**Sample precision (Bits)**
416 |0|7.5|23.5|5|150|21.5
417 |1|10|23.5|6|300|21
418 |2|25|23|7|600|20.5
419 |3|50|22|8|960|20
420 |4|60|22|9|2400|17.5
421
422 **BFM4: State code**
423
424 |(% rowspan="2" %)**Bit NO.**|(% colspan="2" %)**Status code**
425 |**1**|**0**
426 |Bit0|CH1 zero weight (no load)|CH1 is not empty
427 |Bit1|CH2 zero weight (no load)|CH2 is not empty
428 |Bit2|(((
429 CH1 exceeds weight upper limit (overload)
430
431 **✎Note: **The upper limit weight is set by #27 and #28.
432 )))|CH1 is not overloaded
433 |Bit3|(((
434 CH2 exceeds weight upper limit (overload)
435
436 **✎Note: **The upper limit weight is set by #27 and #28.
437 )))|CH2 is not overloaded
438 |Bit4|CH1 measurement value is stable|CH1 measurement value is unstable
439 |Bit5|CH2 measurement value is stable|CH2 measurement value is unstable
440 |Bit6|CH1 uncalibrated / calibrated error|CH1 calibrate successfully
441 |Bit7|CH2 uncalibrated / calibrated error|CH2 calibrate successfully
442 |(((
443 Bit8
444
445 Bit9
446 )))|(((
447 00: no error
448
449 10: The weight of the base point of weight is too large
450 )))|(((
451 01: No-load calibration
452
453 11: Uncalibrated
454 )))
455 |(((
456 Bit10
457
458 Bit11
459 )))|(((
460 00: no error
461
462 10: The weight of the base point of weight is too large
463 )))|(((
464 01: No-load calibration
465
466 11: Uncalibrated
467 )))
468 |Bit12|(((
469 CH1 exceeds the sensor range
470
471 **✎Note:** Determined by sensor feedback voltage
472 )))|CH1 is within the sensor range
473 |Bit14|CH1 enters the calibration without weights|CH1 has not entered the calibration without weights
474 |Bit15|CH2 enters the calibration without weights|CH2 has not entered the calibration without weights
475
476 **BFM5: Error code**
477
478 |**Bit NO.**|**Content**|**Error state**
479 |Bit0|K1 (H0001)|Abnormal power supply
480 |Bit1|K2 (H0002)|Hardware fault
481 |Bit2|K4 (H0004)|CH1 conversion error
482 |Bit3|K8 (H0008)|CH2 conversion error
483 |Bit4|K16 (H0010)|CH1 write calibration parameter error
484 |Bit5|K32 (H0020)|CH2 write calibration parameter error
485 |Others|(% colspan="2" %)Reserved
486 |BFM#45|(% colspan="2" %)Reserved
487 |(% colspan="3" %)(((
488 **✎Note:** A data register that stores all error states. Each error state is determined by the corresponding bit. It is possible to generate more than two error states at the same time. 0 means normal without error; 1 means there is an error state.
489 )))
490
491 **Tare setting: **CH1-BFM6, CH2-BFM46
492
493 Writing 1 to CH1-BFM6/CH2-BFM46 is valid; After execution, reset to 0. Select the current weight value (BFM16-17) as the weight value for the tare weight (BFM19-20). Takes CH1 as an example.
494
495 The current weight value is 100, after tare setting:
496
497 * If the gross weight is currently displayed (BFM7=0), the tare weight (BFM19-20) becomes 100, and the current weight is still 100;
498 * If the net weight is currently displayed (BFM7=1), the tare weight (BFM19-20) becomes the original value + the current weight value, and the current weight value becomes 0.
499
500 **BFM8: Weight calibration instruction**
501
502 Steps are as follows. (Described with CH1)
503
504 * Calibration with weights
505 ** Step1: Do not put any weights on the load cell.
506 ** Step2: #8 value is written as 0x0001.
507 ** Step3: Add standard weights to the load cell.
508 ** Step4: Write the weight of the current weight on the chassis into #23.
509 ** Step5: #8 value is written as 0x0002.
510 * Weightless calibration
511 ** Step1: Do not put any weights on the load cell.
512 ** Step2: Write the maximum range of the sensor into #23.
513 ** Step3: Write the sensor sensitivity into #39, accurate to three decimal places.
514 ** Step4: #8 value is written as 0x0003.
515 * Modify calibration parameters:
516 ** Step1: Modify the calibration parameter values in BFM#35 to BFM#38;
517 ** Step2: #8 value is written as 0x0004.
518
519 **✎Note: **When a value is written to BFM#8 or BFM#48 using the device monitor, it is automatically reset to 0.
520
521 **BFM11: filtering strength**
522
523 The higher the filter strength is, the more stable and accurate the weight value is. But the delay time will increase accordingly, and the sensitivity will decrease.
524
525 **BFM12: zero tracking interval**
526
527 BFM#12 is used in conjunction with BFM#13. When BFM#13 is not 0, BFM#12 indicates the interval between the current automatic weight reset and the next automatic reset to prevent continuous reset.
528
529 **✎Note:** This function is generally used to correct sensor temperature drift.
530
531 **BFM13: Zero tracking range**
532
533 The accumulation range of zero point tracking. If the accumulation exceeds this range, the tracking will not continue.
534
535 |**Settings**|(% style="width:599px" %)**Description**|(% style="width:404px" %)**Remark**
536 |0|(% style="width:599px" %)Do not enable zero tracking|(% style="width:404px" %)Default
537 |1 to 100|(% style="width:599px" %)When setting the zero tracking range (absolute value), tracking must be performed when the value is stable and the current weight is within the zero tracking range.|(% style="width:404px" %)(((
538 If set to 10, the current weight is ±9 and the stable flag is 1, the current weight is cleared.
539 )))
540 |(% colspan="3" %)**✎Note: **When the accuracy of the measured items is not high, the temperature drift has little effect, and this function is not required.
541
542 E.g: The setting value is 100, after the zero point drifts from the 0 position to more than ±100, the tracking will not continue. If it drifts back to within ±100, the tracking will be resumed.
543
544 **BFM15: Set the AD chip gain**
545
546 **I**t can be set according to the sensor range. After the BFM is set, it needs to be re-calibrated.
547
548 |**BFM15**|**voltage range**|**Sensor sensitivity**
549 |0|±5V|<1V/V
550 |1|±625mV|<125mV/V
551 |2|±312.5mV|<62.5mV/V
552 |3|±156.2mV|<31.25mV/V
553 |4|±78.125mV|<15.625mV/V
554 |5|±39.06mV|<7.812mV/V
555
556 == **Function description** ==
557
558 **Net weight measurement function**
559
560 You could choose whether the measured weight is net weight or gross weight. Net weight refers to the weight of the product itself, that is, the actual weight of the product after removing the weight of the outer packaging. The weight of the outer packaging is generally called the tare weight, and the gross weight is the total weight, which refers to net weight plus tare weight.
561
562 * Tare weigh:t Refers to the weight of the outer packaging.
563 * Net weight: Refers to the weight of the product itself, that is, the actual weight of the product after removing the weight of the outer packaging.
564 * Gross weight: Refers to the total weight, that is, the weight of the product itself (net weight), plus the weight of the outer packaging (tare weight)
565 * Gross weight = net weight + tare weight
566
567 E.g: There is a product that is 10KG, the carton it is packed in weighs 0.2KG, and the total weight is 10.2KG.
568
569 * Net weight=10KG
570 * Tare weight=0.2KG
571 * Gross weight=10.2KG
572
573 E.g: Use CH1 to measure the value to display the net weight, and CH2 to select OFF. (If the weight of the outer package is known, you can skip the step of reading the tare weight).
574
575 * Read the tare value
576 ** Write H0000 in BFM7;
577 ** Place the package on the CH1 weighing module;
578 ** Write H0001 in BFM6, and take the current package weight as the tare weight.
579 * Set BFM7=H0001
580
581 **Stability check**
582
583 When placing the item on the weighing module to measure the weight, the user can use the stability check function to know that the current measurement value is stable.
584
585 * If the variation range of the measured value is within the stable range #22 set by the user, the #4 stable bit of the measured value will be set to 1.
586 * When the variation range of the measured value exceeds the set stability range, the #4 stable bit of the measured value will be set to 0, until the stability check time #21 is within the stable range, the #4 stable bit of the measured value will be set to 1 again.
587
588 E.g: The stability check time is set to 200ms, and the stability check range is 10. When the change range exceeds 10, the measurement value is unstable, that is, the #4 stable bit of the measured value will be set to 0. When the beating range is within 10 within 200ms, the stable bit of the measurement value will be set to 1 again. (It is recommended that the user should judge whether the current measurement value is stable before performing control).
589
590 **Zero point judgment**
591
592 You could use the zero point judgment function to know that the item has been removed from the weighing module. You could judge that the measurement value is stable and the Bit is 1, which means that the item has been removed from the weighing module, and you could perform the next step at this time. (The zero point weight Bit in the zero point judgment range is 1).
593
594 **Filter function**
595
596 The average value is the function of summing and averaging the read values to obtain a slowing value, but the environment used will have unavoidable external force factors, which will cause the read value to have a sharp change in the surge value. The change also becomes larger. The function of filtering is not to include the sharply changing surge value in the aggregated average, and the obtained filtered average value will not be affected by the sharply changed surge value.
597
598 = **6 Example** =
599
600 **Current state of weight**
601
602 (% style="text-align:center" %)
603 [[image:image-20220622145646-14.png||height="51" width="330"]]
604
605 Read the current weighing state BFM4 and judge it by Bit state. For details, please refer to the description of BFM4 in "5.2 Buffer Register Description".
606
607 **Get current weight value**
608
609 (% style="text-align:center" %)
610 [[image:image-20220622145005-7.png||height="51" width="385"]]
611
612 Write the average weight value (BFM16) of CH1 in the weighing module into D0.
613
614 **Calibrating weight**
615
616 *In the new version, the first step can also be used for manual reset.
617
618 The adjustment is to make the module match the weight value of the load cell of the weighing module. The adjustment steps are as follows. Described with CH1.
619
620 (% style="text-align:center" %)
621 [[image:image-20220622145005-8.jpeg||height="193" width="797"]]
622
623 **Tare weight and gross weight**
624
625 (% style="text-align:center" %)
626 [[image:image-20220622145005-9.jpeg||height="274" width="749"]]
627
628 **Filter mode setting**
629
630 After setting the filtering mode and filtering strength, you need to calibrate it again.
631
632 (% style="text-align:center" %)
633 [[image:image-20220622145005-10.jpeg||height="196" width="791"]]
634
635 **Zero tracking**
636
637 Zero tracking is used to reduce the temperature drift interference;
638
639 Set Zero Tracking Intensity to 0 to disable tracking. Set Zero Tracking Range to 0 to make it is unlimited.
640
641 (% style="text-align:center" %)
642 [[image:image-20220622145005-11.jpeg||height="242" width="601"]]
643
644 **Calibration without weights**
645
646 Calibration without weights is performed by the zero point of the sensor and the maximum range of the sensor. The accuracy is related to the sensor specifications and depends on the sensor sensitivity (mV/V).
647
648 Example: The sensitivity of LAB-B-B sensor is 2.0±10%mV/V, and there may be a maximum error of 10%, so it is best to use a sensor with a small sensor sensitivity error to use this function.
649
650 (% style="text-align:center" %)
651 [[image:image-20220622145005-12.jpeg||height="323" width="774"]]
652
653 **Modify calibration parameters**
654
655 (% style="text-align:center" %)
656 [[image:image-20220622145005-13.jpeg||height="315" width="838"]]
657
658 **✎Note: **BFM35, BFM36, BFM37, and BFM38 are real number (float). Real numbers need to be input when inputting. If the input exceeds the range, BFM5 will report an error in writing calibration parameters.
659
660 = **7 Diagnosis ** =
661
662 == **Check** ==
663
664 1. Make sure all cables are connected properly;
665 1. Make sure all rules regarding LX3V expansion modules are met. Such as expansion modules other than digital inputs and outputs are no more than 8 in total. The total number of digital inputs and outputs are no greater than 256.
666 1. Make sure to select the correct operating range in application;
667 1. Make sure power supply is working properly;
668 1. LX3V CPU unit is in RUN mode;
669
670 == **Check errors** ==
671
672 If the special function module LX3V-2WT does not operate normally, please check the following items.
673
674 * Check the status of the LINK indicator
675 ** Blink: Expansion cables are properly connected.
676 ** Otherwise: Check the connection of the extension cable.
677 * Check the status of the "24V" LED indicator (top right corner of the LX3V-2WT)
678 ** Light on LX3V-2WT is normal, and 24VDC power is normal.
679 ** Otherwise: 24V DC power supply may be faulty. If the power supply is normal then the LX3V-2WT is faulty.
680 * Check the status of the "COM" LED indicator (top right corner of the LX3V-2WT)
681 ** Blink: Numeric conversion works fine.
682 ** Otherwise: Check buffer memory #5 (error status). If any of the bits (b0, b1, b2) are ON, that's why the COM indicator is off. For details, please refer to "(6) BFM5: Error Code" in "5.2 Buffer Register (BFM) Description" in "Chapter 5" of this manual.
683 * Check the sensor, measure whether the voltage between S+ and S- is less than (5*sensor sensitivity) mv, the sensor sensitivity is found in the sensor manual used, the unit is (mv/v), if the voltage at this point is out of range, it means the sensor Deformation or wiring errors have occurred. Measure whether the voltage between F+ and F- is 5V, if not, check the sensor wiring.