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Changes for page LX3V-4AD

Last modified by Devin Chen on 2024/11/27 15:04
From version 16.1
edited by Devin Chen
on 2024/11/27 15:04
Change comment: There is no comment for this version
To version 3.1
edited by Stone Wu
on 2022/07/28 10:35
Change comment: There is no comment for this version

Summary

Details

Page properties
Author
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1 -XWiki.DevinChen
1 +XWiki.Stone
Content
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10 10  (% style="text-align:center" %)
11 11  [[image:LX3V-4AD_html_5159808b9e4fa86a.png||height="391" width="1000" class="img-thumbnail"]]
12 12  
13 -1. (((
14 -Extension cable and connector
15 -)))
16 -1. (((
17 -COM LED: Light when communicating Error LED: Channel calibration indicators
18 -)))
19 -1. (((
20 -Power LED: Light when connect to 24V
21 -)))
22 -1. (((
23 -State LED: Light when normal condition
24 -)))
25 -1. (((
26 -Link LED: Light when communicate with PLC
27 -)))
28 -1. (((
29 -Module name
30 -)))
31 -1. (((
32 -Extension module interface
33 -)))
34 -1. (((
35 -DIN rail mounting slot
36 -)))
37 -1. (((
38 -DIN rail hook
39 -)))
40 -1. (((
41 -Holes for direct installation: 2 places (Φ4.5)
42 -)))
13 +① Extension cable and connector
43 43  
44 -(((
45 -(% style="margin-left:auto; margin-right:auto" %)
46 -|=**Name**|=**Description**|=**Light status**|=**Event status**
47 -|(% rowspan="2" %)(((
48 -COM LED
15 +② COM LED: Light when communicating
49 49  
50 -
51 -)))|(% rowspan="2" %)(((
52 -Communication indicator for communication board and acquisition board
17 +③ Power LED: Light when connect to 24V
53 53  
54 -
55 -)))|Flashing|Data interacting
56 -|Off|Data interaction error/stop/failure
57 -|(% rowspan="2" %)(((
58 -ERR LED
19 +④ State LED: Light when normal condition
59 59  
60 -
61 -)))|(% rowspan="2" %)(((
62 -Factory calibration LED
21 +⑤ Module name
63 63  
64 -
65 -)))|Off|Factory calibrated
66 -|Lighting|Factory uncalibrated
67 -|(% rowspan="2" %)(((
68 -24V LED
23 +⑥ Analog signal output terminal
69 69  
70 -
71 -)))|(% rowspan="2" %)(((
72 -Power indicator
25 +⑦ Extension module interface
73 73  
74 -
75 -)))|Off|24V power is abnormal.
76 -|Lighting|24V power is normal.
77 -|(% rowspan="3" %)(((
78 -LINK LED
27 +⑧ DIN rail mounting slot
79 79  
80 -
81 -)))|(% rowspan="3" %)(((
82 -Communication indicator for PLC and expansion module
29 +⑨ DIN rail hook
83 83  
84 -
85 -)))|Flashing|Data interacting
86 -|Off|Data interaction error/stop/failure
87 -|Lighting|Software running abnormal or hardware failure
88 -|(% rowspan="3" %)(((
89 -AD LED
31 +(((
32 +* Please use crimp terminals as indicated on the graph.
33 +* The tightening torque should be applied 5 to 8 Kg.cm.
90 90  
91 -
92 -)))|(% rowspan="3" %)(((
93 -4 channel indicators
94 -
95 -
96 -)))|Flashing|Input voltage or current range exceed limit or channel unconnected
97 -|Off|Channel closed
98 -|Lighting|Input analog is in the normal range
99 -
100 100  (% style="text-align:center" %)
101 -[[image:LX3V-4AD_html_5bc4b53029347d0f.png||height="309" width="618" class="img-thumbnail"]]
36 +[[image:LX3V-4AD_html_5bc4b53029347d0f.png||height="195" width="400" class="img-thumbnail"]]
102 102  
103 -
104 -Please use crimp terminals as indicated on the graph.
105 -
106 -The tightening torque should be applied 5 to 8 Kg.cm.
107 -
108 108  = **3 Terminal layouts** =
109 109  
110 110  (% style="text-align:center" %)
111 -[[image:image-20220728103451-1.png||class="img-thumbnail"]]
41 +[[image:image-20220728103451-1.png]]
112 112  )))
113 113  
114 114  (((
... ... @@ -118,9 +118,11 @@
118 118  1. If there is excessive electrical noise, connect the FG frame ground terminal with the grounded terminal on the LX3V-4AD.
119 119  1. Connect the ground terminal on the LX3V-4AD unit with the grounded terminal on the main unit. Use class 3 grounding on the main unit, if available.
120 120  
121 -**Note: when connect a 4-20ma sensor(need +24V working voltage), the wiring is as below:**
51 +(% style="text-align:center" %)
52 +[[image:4-20mA 2-wire.png||height="528" width="600" class="img-thumbnail"]]
122 122  
123 -[[image:企业微信截图_16771315134574.png]]
54 +(% style="text-align:center" %)
55 +[[image:4-20mA 3-wire.png||height="510" width="600" class="img-thumbnail"]]
124 124  
125 125  = **4 Installation** =
126 126  )))
... ... @@ -128,25 +128,25 @@
128 128  **Environment specification**
129 129  
130 130  (% class="table-bordered" %)
131 -|=(% style="width: 490px;" %)**Item**|=(% style="width: 585px;" %)**Specification**
132 -|(% style="width:490px" %)Environmental specifications (excluding following)|(% style="width:585px" %)Same as those for the LX3V main unit
133 -|(% style="width:490px" %)Dielectric withstand voltage|(% style="width:585px" %)500VAC, 1min (between all terminals and ground)
63 +|**Item**|**Specification**
64 +|Environmental specifications (excluding following)|Same as those for the LX3V main unit
65 +|Dielectric withstand voltage|500VAC, 1min (between all terminals and ground)
134 134  
135 135  **Power supply specification**
136 136  
137 137  (% class="table-bordered" %)
138 -|=(% style="width: 294px;" %)**Item**|=(% style="width: 781px;" %)**Specification**
139 -|(% style="width:294px" %)Analog circuits|(% style="width:781px" %)24V DC ± 10%, 55mA (external power supply from main unit)
140 -|(% style="width:294px" %)Digital circuits|(% style="width:781px" %)5V DC, 90mA (internal power supply from main unit)
70 +|**Item**|**Specification**
71 +|Analog circuits|24V DC ± 10%, 55mA (external power supply from main unit)
72 +|Digital circuits|5V DC, 90mA (internal power supply from main unit)
141 141  
142 142  **Performance specification**
143 143  
144 144  **Analog Inputs**
145 145  
146 -(% style="margin-left:auto; margin-right:auto" %)
147 -|= |=**Voltage Input**|=**Current input**
148 -|=**Items**|(% colspan="2" %)Either voltage or current input can be selected with your choice of input terminal. Up to four input points can be used at one time.
149 -|=**Analog input range**|(((
78 +(% class="table-bordered" %)
79 +| |**Voltage Input**|**Current input**
80 +|**Items**|(% colspan="2" %)Either voltage or current input can be selected with your choice of input terminal. Up to four input points can be used at one time.
81 +|**Analog input range**|(((
150 150  DC -10V to +10V (input resistance: 200kΩ).
151 151  
152 152  Warning: this unit may be damaged by input voltage in excess of ±15V
... ... @@ -155,34 +155,33 @@
155 155  
156 156  Warning: this unit may be damaged by input currents in excess of ±32mA.
157 157  )))
158 -|=**Digital output**|(% colspan="2" %)(((
90 +|**Digital output**|(% colspan="2" %)(((
159 159  12-bit conversion stored in 16-bit 2’s complement form
160 160  
161 -Maximum value: +2047 Minimum value: -2048
93 +Maximum value:+2047 Minimum value:-2048
162 162  )))
163 -|=**Analog accuracy**|±1% (for the range of -10V to +10V)|±1% (for the range of -20mA to +20mA)
164 -|=(((
95 +|**Analog accuracy**|±1% (for the range of -10V to +10V)|±1% (for the range of -20mA to +20mA)
96 +|(((
165 165  **Conversion**
166 166  
167 -**time for each channel**
168 -)))|(% colspan="2" %)Tconv ≤10ms (High-speed), 10ms≤Tconv≤20ms (Middle speed), Tconv>20ms (Low speed)
99 +**speed**
100 +)))|(% colspan="2" %)15ms/channel (Normal speed), 6ms/channel (High speed)
169 169  
170 170  **Analog Inputs continued...**
171 171  
172 172  (% class="table-bordered" %)
173 -|=**Preset 0 (-10V to +10V)**|=**Preset 1 (+4mA to +20mA)**|=**Preset 2 (-20mA to +20mA)**
174 -|[[image:LX3V-4AD_html_8bdc9efc08b433c8.png||height="371" width="420" class="img-thumbnail"]]|[[image:LX3V-4AD_html_a268382a2adb0b80.png||height="345" width="420" class="img-thumbnail"]]|[[image:LX3V-4AD_html_a58cfb9f37ade123.png||height="363" width="420" class="img-thumbnail"]]
105 +|**Preset 0 (-10V to +10V)**|**Preset 1 (+4mA to +20mA)**|**Preset 2 (-20mA to +20mA)**
106 +|[[image:LX3V-4AD_html_8bdc9efc08b433c8.png||class="img-thumbnail"]]|[[image:LX3V-4AD_html_a268382a2adb0b80.png||class="img-thumbnail"]]|[[image:LX3V-4AD_html_a58cfb9f37ade123.png||class="img-thumbnail"]]
175 175  
176 -(% class="box infomessage" %)
177 -(((
178 -**✎Note: **Preset ranges are selected by an appropriate setting in buffer memory of the analog block. Current/Voltage input selection must match the correct input terminal connections.
179 -)))
108 +**✎Note: **
180 180  
110 +Preset ranges are selected by an appropriate setting in buffer memory of the analog block. Current/Voltage input selection must match the correct input terminal connections.
111 +
181 181  **Miscellaneous**
182 182  
183 183  (% class="table-bordered" %)
184 -|=(% scope="row" style="width: 147px;" %)**Item**|=(% style="width: 928px;" %)**Description**
185 -|=(% style="width: 147px;" %)Isolation|(% style="width:928px" %)(((
115 +|**Item**|**Description**
116 +|Isolation|(((
186 186  Photo-couple isolation between analog and digital circuits. DC/DC converter isolation of power from LX3VCPU.
187 187  
188 188  No isolation between analog channels.
... ... @@ -190,44 +190,28 @@
190 190  
191 191  **Allocation of buffer memories (BFM)**
192 192  
193 -(% style="margin-left:auto; margin-right:auto" %)
194 -|=**BFM**|=(% colspan="9" %)**Description**
124 +(% class="table-bordered" %)
125 +|**BFM**|(% colspan="9" %)**Description**
195 195  |*#0|(% colspan="9" %)Channel initialization, default=H0000
196 -|*#1|Channel 1|(% colspan="8" rowspan="4" %)(((
127 +|*#1|(% style="width:244px" %)Channel 1|(% colspan="8" rowspan="4" style="width:769px" %)(((
197 197  Contains the number of samples (1 to 4096) to be used for an averaged result.
198 198  
199 199  The default setting is 8-normal speed. High speed operation can be selected with a value of 1.
200 200  )))
201 -|*#2|Channel 2
202 -|*#3|Channel 3
203 -|*#4|Channel 4
204 -|#5|Channel 1|(% colspan="8" rowspan="4" %)These buffer memories contain the averaged input values for the number of samples entered for the channel in buffer memories #1 to #4 respectively.
205 -|#6|Channel 2
206 -|#7|Channel 3
207 -|#8|Channel 4
208 -|#9|Channel 1|(% colspan="8" rowspan="4" %)These buffer memories contain the present value currently being read by each input channel.
209 -|#10|Channel 2
210 -|#11|Channel 3
211 -|#12|Channel 4
132 +|*#2|(% style="width:244px" %)Channel 2
133 +|*#3|(% style="width:244px" %)Channel 3
134 +|*#4|(% style="width:244px" %)Channel 4
135 +|#5|(% style="width:244px" %)Channel 1|(% colspan="8" rowspan="4" style="width:769px" %)These buffer memories contain the averaged input values for the number of samples entered for the channel in buffer memories #1 to #4 respectively.
136 +|#6|(% style="width:244px" %)Channel 2
137 +|#7|(% style="width:244px" %)Channel 3
138 +|#8|(% style="width:244px" %)Channel 4
139 +|#9|(% style="width:244px" %)Channel 1|(% colspan="8" rowspan="4" style="width:769px" %)These buffer memories contain the present value currently being read by each input channel.
140 +|#10|(% style="width:244px" %)Channel 2
141 +|#11|(% style="width:244px" %)Channel 3
142 +|#12|(% style="width:244px" %)Channel 4
212 212  |#13-#14|(% colspan="9" %)Reserved
213 -|(% rowspan="10" %)#15|(% rowspan="10" %)(((
214 -Selection of A/D conversion speed
215 -
216 -Please refer to note 2
217 -)))|(% colspan="4" %)Set value|(% colspan="4" %)(((
218 -Conversion time
219 -
220 -(Unit: ms/channel)
221 -)))
222 -|(% colspan="4" %)0 (Default)|(% colspan="4" %)15
223 -|(% colspan="4" %)1|(% colspan="4" %)6
224 -|(% colspan="4" %)10|(% colspan="4" %)3
225 -|(% colspan="4" %)11|(% colspan="4" %)4.5
226 -|(% colspan="4" %)12|(% colspan="4" %)7
227 -|(% colspan="4" %)13|(% colspan="4" %)12.5
228 -|(% colspan="4" %)14|(% colspan="4" %)23.5
229 -|(% colspan="4" %)15|(% colspan="4" %)45.5
230 -|(% colspan="4" %)16|(% colspan="4" %)101
144 +|(% rowspan="2" %)#15|(% rowspan="2" style="width:244px" %)Selection of A/D conversion speed please refer to note 2|(% colspan="8" style="width:769px" %)When set to 0, a normal speed is selected of 15m/s.ch (default)
145 +|(% colspan="8" style="width:769px" %)When set to 1, a high speed is selected of 6m/s.ch
231 231  |#16-#19|(% colspan="9" %)Reserved
232 232  |*#20|(% colspan="9" %)Reset to Defaults and Preset. Default = 0
233 233  |*#21|(% colspan="9" %)(((
... ... @@ -235,9 +235,10 @@
235 235  
236 236  Default = (0, 1) Permit
237 237  )))
238 -|*#22|Offset, Gain Adjust|G4|04|G3|03|G2|01|G1|01
239 -|*#23|(% colspan="9" %)Offset Value    Default = 0
240 -|*#24|(% colspan="9" %)Gain Value      Default = 5,000
153 +|(% rowspan="2" %)*#22|(% rowspan="2" style="width:244px" %)Offset, Gain Adjust|(% style="width:84px" %)b7|(% style="width:91px" %)b6|(% style="width:94px" %)b5|(% style="width:94px" %)b4|(% style="width:100px" %)b3|(% style="width:107px" %)b2|(% style="width:120px" %)b1|b0
154 +|(% style="width:84px" %)G4|(% style="width:91px" %)O4|(% style="width:94px" %)G3|(% style="width:94px" %)O3|(% style="width:100px" %)G2|(% style="width:107px" %)O2|(% style="width:120px" %)G1|O1
155 +|*#23|(% colspan="9" %)Offset Value Default = 0
156 +|*#24|(% colspan="9" %)Gain Value Default = 5,000
241 241  |#25-#28|(% colspan="9" %)Reserved
242 242  |#29|(% colspan="9" %)Error status
243 243  |#30|(% colspan="9" %)(((
... ... @@ -247,48 +247,46 @@
247 247  )))
248 248  |#31|(% colspan="9" %)Hardware version
249 249  
250 -(% class="box infomessage" %)
251 -(((
252 -**✎Note: **
253 -
254 254  * In buffer memory locations (BFM’s) marked with an “*” data can be written from the PC using the TO command.
255 255  * For buffer memories (BFM’s) without “*”mark, data can be read to the PC using the FROM command.
256 256  * Before reading from the analog special function block, ensure these settings have been sent to the analog special function block. Otherwise, the previous values held in the analog block will be used.
257 257  * Offset (intercept): The analog input value when the digital output becomes 0.
258 258  * Gain (slope): The analog input value when the digital output becomes +1000.
259 -)))
260 260  
261 -**Channel Selection**
172 +**✎Note: **
262 262  
174 +* **Channel Selection**
175 +
263 263  Channel initialization is made by a 4 character HEX number HOOOO in buffer memory BFM #0. The least significant character controls channel 1 and the 4 character controls channel4.
264 264  
265 265  (% class="table-bordered" %)
266 -|=(% scope="row" %)**BFM#0**|=**Analog input**|=**Digital output**|=**Resolution**|=**Offset/Gain**|=**Constant**
267 -|=0|-10V~~10V|-2000~~2000|5 mV|0/5000|1000
268 -|=1|4mA~~20mA|0~~1000|16µA|4000/20000|1000
269 -|=2|-20mA~~20mA|-1000~~1000|20µA|0/20000|1000
270 -|=3|Disabled|/|/|/|/
271 -|=4|-10V~~10V|-10000~~10000|1mV|0/5000|10000
272 -|=5|4 mA ~~20mA|0~~10000|1.6µA|4000/20000|10000
273 -|=6|-20mA~~20mA|-10000~~10000|2.0µA|0/20000|10000
179 +|**BFM#0**|**Analog input**|**Digital output**|**Resolution**|**Offset/Gain**|**Constant**
180 +|0|-10V~~10V|-2000~~2000|5 mV|0/5000|1000
181 +|1|4mA~~20mA|0~~1000|16µA|4000/20000|1000
182 +|2|-20mA~~20mA|-1000~~1000|20µA|0/20000|1000
183 +|3|Disabled|/|/|/|/
184 +|4|-10V~~10V|-10000~~10000|1mV|0/5000|10000
185 +|5|4 mA ~~20mA|0~~10000|1.6µA|4000/20000|10000
186 +|6|-20mA~~20mA|-10000~~10000|2.0µA|0/20000|10000
274 274  
275 275  **Example: H3310**
276 276  
277 -* CH1: Preset range (-10V to +10V).
278 -* CH2: Preset range (+4mA to +20mA).
279 -* CH3, CH4: Channel OFF.
190 +CH1: Preset range (-10V to +10V).
280 280  
281 -**Analog to Digital Conversion Speed Change**
192 +CH2: Preset range (+4mA to +20mA).
282 282  
283 -By writing 0, 1 or decimal numbers between 10-16 into BFM#15 of the LX3V-4AD, the time at which A/D conversion is performed can be changed.
194 +CH3, CH4: Channel OFF.
284 284  
285 -However, the following points should be noted:
196 +* **Analog to Digital Conversion Speed Change**
286 286  
287 -1. To maintain a high-speed conversion, please use the FROM/TO commands as seldom as possible.
288 -1. When a conversion speed change occurs, BFM #1-#4 are set to their default values immediately after the change. Please be careful if an A/D time conversion will be part of the normal program execution.
289 -1. High-speed time conversion is usually used with BFM#1-#4.
290 -1. BFM#15 is configurated with the corresponding conversion time of 10-16, only supported by software version 20000 or above.
198 +By writing 0 or 1 into BFM #15 of the LX3V-4AD, the speed at which A/D conversion is performed can be changed.
291 291  
200 +However the following points should be noted: To maintain a high speed conversion rate, use the FROM/TO commands as seldom as possible.
201 +
202 +**✎Note: **
203 +
204 +* When a conversion speed change is made, BFM #1-#4 are set to their default values immediately after the change. This is regardless of the values they held originally. Bear this in mind if a speed change will be made as part of the normal program execution.
205 +
292 292  **Adjusting Gain and Offset values**
293 293  
294 294  **Formula for Gain/Offset: Digital output= (Analog input-Offset)*Constant/ (Gain-Offset)**
... ... @@ -296,15 +296,7 @@
296 296  * When buffer memory BFM #20 is activated by setting it to K1, all settings within the analog special function block are reset to their default settings. This is a very quick method to erase any undesired gain and offset adjustments.
297 297  * If (b1, b0) of BFM #21 is set to (1, 0), gain and offset adjustments are prohibited to prevent inadvertent changes by the operator. In order to adjust the gain and offset values, bits (b1, b0) must be set to (0, 1). The default is (0, 1).
298 298  * Gain and offset values of BFM #23 and #24 are sent to non-volatile memory gain and offset registers of the specified input channels. Input channels to be adjusted are specified by the appropriate G-O (gain-offset) bits of BFM #22.
299 -* (((
300 -Example:
301 301  
302 -If bits G1 and O1 are set to 1, input channel 1 will be adjusted when BFM #22 is written to by a TO instruction.
303 -)))
304 -* Channels can be adjusted individually or together with the same gain and offset values.
305 -* Gain and offset values in BFM #23 #24 are in units of mV or µA. Due to the resolution of the unit the actual response will be in steps of 5mV or 20µA.
306 -* When gain is less than or equal to offset, error will be adjusted. Gain and offset will not change. Error status will be given at BFM#29 b1. B4-b7 will give a specific channel offset/gain error.
307 -
308 308  Example:
309 309  
310 310  If bits G1 and O1 are set to 1, input channel 1 will be adjusted when BFM #22 is written to by a TO instruction.
... ... @@ -314,25 +314,20 @@
314 314  
315 315  **Status Information BFM #29**
316 316  
317 -(% style="margin-left:auto; margin-right:auto" %)
318 -|=**Bit devices of BFM #29**|=**ON**|=**OFF**
319 -|b0: Error|When any of b1 to b4 is ON. If any of b2 to b4 is ON, A/D conversion of all the channels is stopped|No error
320 -|b1: Offset/gain error|Offset/Gain data in EEPROM is corrupted or adjustment error.|Offset/Gain data normal
321 -|b2: Power source abnormality|24V DC power supply failure|Power supply normal
322 -|b3: Hardware error|A/D converter or other hardware failure|Hardware normal
323 -|b4: Channel 1 offset/gain error|(% rowspan="4" %)When channel offset/gain error is modified, the corresponding position is ON.|(% rowspan="4" %)Offset/Gain adjustment normal
324 -|b5: Channel 2 offset/gain error
325 -|b6: Channel 3 offset/gain error
326 -|b7: Channel 4 offset/gain error
327 -|b10: Digital range error|Digital output value is less than -2048 or more than +2047|Averaging is normal. (Between 1 and 4096)
328 -|b11: Averaging error|Number of averaging samples is 4097 or more or 0 or less (default of 8 will be used)|Averaging is normal. (Between 1 and 4096)
329 -|b12: Adjust prohibit|Prohibit-(b1, b0) of BFM #21 is set to (1, 0)|Permit-(b1, b0) of BFM #21 is set to (0,1)
223 +(% class="table-bordered" %)
224 +|**Bit devices of BFM #29**|(% style="width:570px" %)**ON**|(% style="width:313px" %)**OFF**
225 +|b0: Error|(% style="width:570px" %)When any of b1 to b4 is ON. If any of b2 to b4 is ON, A/D conversion of all the channels is stopped|(% style="width:313px" %)No error
226 +|b1: Offset/gain error|(% style="width:570px" %)Offset/Gain data in EEPROM is corrupted or adjustment error.|(% style="width:313px" %)Offset/Gain data normal
227 +|b2: Power source abnormality|(% style="width:570px" %)24V DC power supply failure|(% style="width:313px" %)Power supply normal
228 +|b3: Hardware error|(% style="width:570px" %)A/D converter or other hardware failure|(% style="width:313px" %)Hardware normal
229 +|b10: Digital range error|(% style="width:570px" %)Digital output value is less than -2048 or more than +2047|(% style="width:313px" %)Averaging is normal. (between 1 and 4096)
230 +|b11: Averaging error|(% style="width:570px" %)Number of averaging samples is 4097 or more or 0 or less (default of 8 will be used)|(% style="width:313px" %)Averaging is normal. (between 1 and 4096)
231 +|b12: Adjust prohibit|(% style="width:570px" %)Prohibit-(b1, b0) of BFM #21 is set to (1, 0)|(% style="width:313px" %)Permit-(b1, b0) of BFM #21 is set to (0,1)
330 330  
331 -(% class="box infomessage" %)
332 -(((
333 -**✎Note: **b8, b9 and b13 to b15 are undefined.
334 -)))
233 +**✎Note: **
335 335  
235 +* b4 to b7, b9 and b13 to b15 are undefined.
236 +
336 336  **Identification Code BFM #30**
337 337  
338 338  The identification (or ID) code number for a Special Function Block is read using the FROM command.
... ... @@ -341,48 +341,51 @@
341 341  
342 342  The user’s program in the PC can use this facility in the program to identify the special function block before commencing data transfer from and to the special function block.
343 343  
344 -(% class="box infomessage" %)
345 -(((
346 346  **✎Note: **
347 347  
348 348  * Values of BFM #0, #23 and #24 are copied to EEPROM memory of the LX3V-4AD. BFM #21 and BFM #22 are only copied when data is written to the gain/offset command buffer BFM #22. Also, BFM #20 causes writing to the EEPROM memory. The EEPROM has a life of about 10,000 cycles (changes), so do not use programs which frequently change these BFMs.
349 349  
350 350  * Because of the time needed to write to the EEPROM memory, a delay of 300 ms is required between instructions that cause a write to the EEPROM. Therefore, a delay timer should be used before writing to the EEPROM a second time.
351 -)))
352 352  
353 353  = **5 Defining gain and offset** =
354 354  
355 355  Gain determines the angle or slope of the calibration line, identified at a digital value of 1000.
356 356  
357 -* (a) Small gain: Large steps in digital readings
358 -* (b) Zero gain: Default is 5V or 20mA.
359 -* (c) Large gain: Small steps in digital readings.
255 +(a) Small gain: Large steps in digital readings
360 360  
257 +(b) Zero gain: Default is 5V or 20mA.
258 +
259 +(c) Large gain: Small steps in digital readings.
260 +
361 361  Offset is the “Position” of the calibrated line, identified at a digital value of 0.
362 362  
363 -* (d) Negative offset.
364 -* (e) Zero offset: Default is 0V or 4mA.
365 -* (f) Positive offset.
263 +(d) Negative offset.
366 366  
265 +(e) Zero offset: Default is 0V or 4mA.
266 +
267 +(f) Positive offset.
268 +
367 367  (% style="text-align:center" %)
368 -[[image:LX3V-4AD_html_f78533c1d988f63f.png||height="298" width="800" class="img-thumbnail"]]
270 +[[image:LX3V-4AD_html_f78533c1d988f63f.png||class="img-thumbnail" height="298" width="800"]]
369 369  
370 370  Offset and gain can be set independently or together. Reasonable offset ranges are -5 to +5V or -20mA to 20mA, and gain values 1V to 15V or 4mA to 32mA. Gain and offset can be adjusted by software in the LX3V main unit (please refer to program example 2).
371 371  
372 -* Bit device’s b1, b0 of the gain/offset BFM #21 should be set to 0, 1 to allow adjustment.
274 +* Bit device’s b1, b2 of the gain/offset BFM #21 should be set to 0, 1 to allow adjustment.
373 373  * Once adjustment is complete these bit devices should be set to 1, 0 to prohibit any further changes.
374 374  * Channel initialization (BFM #0) should be set to the nearest range, i. e. voltage/current etc.
375 375  
376 376  = **6 Example program** =
377 377  
378 -**Basic program**
280 +**basic program**
379 379  
380 -In the following example channels CH1 and CH2 are used as voltage inputs. The LX3V-4AD block is connected at the position of special function block No.0. Averaging is set at 4 and data registers D0 and D1 of the PC receive the averaged digital data. The FROM code for the special function block at position “0" is read from BFM #30 of that block and stored at D4 in the main unit. CMP is compared to check the block is a LX3V-4AD, if OK M1 is turned ON.
282 +In the following example channels CH1 and CH2 are used as voltage inputs. The LX3V-4AD block is connected at the position of special function block No.0. Averaging is set at 4 and data registers D0 and D1 of the PC receive the averaged digital data.
381 381  
382 -[[image:LX3V-4AD_html_e3a9b9608260f138.png||height="297" style="float:left" width="600" class="img-thumbnail"]]
284 +(% style="text-align:center" %)
285 +[[image:LX3V-4AD_html_e3a9b9608260f138.png||class="img-thumbnail" height="297" width="600"]]
383 383  
384 384  **✎Note: **
385 385  
289 +1. The FROM code for the special function block at position “0" is read from BFM #30 of that block and stored at D4 in the main unit. CMP is compared to check the block is a LX3V-4AD, if OK M1 is turned ON.
386 386  1. TO code: The analog input channels (CH1, CH2) are setup by writing H3300 to BFM #0 of the LX3V-4AD
387 387  1. The number of averaged samples for CH1 and CH2 is set to 4 by writing 4 to BFM #1 and #2 respectively.
388 388  1. The operational status of the LX3V-4AD is read from BFM #29 and output as bit devices at the LX3V main unit. If there are no errors in the operation of the LX3V-4AD, then the averaged data BFM’s are read.
... ... @@ -401,31 +401,28 @@
401 401  Example: Adjusting gain/offset via software settings
402 402  
403 403  (% style="text-align:center" %)
404 -[[image:LX3V-4AD_html_41bef52ee180f2c9.png||height="980" width="600" class="img-thumbnail"]]
308 +[[image:LX3V-4AD_html_41bef52ee180f2c9.png||class="img-thumbnail" height="980" width="600"]]
405 405  
406 406  (((
407 407  Adjustment start
408 408  
409 -* (H0000)->BFM#0 (initialize input channels). Enter the instructions on the left and RUN the PC
410 -* (K1)->BFM#21. BFM#21 must be set to permit with (b1, b0)=(0,1)
411 -* (K0)->BFM#22 (offset/gain adjusts). Reset adjust bits
412 -* (K0)-> BFM#23 (offset)
413 -* (K2500)-> BFM#24 (gain)
414 -* (H0003)->BFM#22(offset/gain adjusts). 3=0011 i.e. O1=1, G1=1. Therefore channel 1 is adjusted.
313 +(H0000)->BFM#0 (initialize input channels). Enter the instructions on the left and RUN the PC
415 415  
416 -Adjustment ends.
315 +(K1)->BFM#21. BFM#21 must be set to permit with (b1, b0)=(0,1)
417 417  
418 -(K2)-> BFM#21. BFM#21 gain/offset adjust prohibit
317 +(K0)->BFM#22 (offset/gain adjusts). Reset adjust bits
419 419  
420 -**High-speed conversion by changing A/D conversion time in a program**
319 +(K0)-> BFM#23 (offset)
421 421  
422 -**[[image:6.3-图片1.png]]**
423 -)))
321 +(K2500)-> BFM#24 (gain)
424 424  
425 -Writing K10 to BFM#15 and set conversion time of all channels as 3ms.
323 +(H0003)->BFM#22(offset/gain adjusts). 3=0011 i.e. O1=1, G1=1. Therefore channel 1 is adjusted.
426 426  
427 -Writing 1 to BFM#1 and set Channel 1 sample count to 1 to Channel 1 high-speed conversion.
325 +Adjustment ends.
428 428  
327 +(K2)-> BFM#21. BFM#21 gain/offset adjust prohibit
328 +)))
329 +
429 429  = **7 Diagnostics** =
430 430  
431 431  **Preliminary checks**
... ... @@ -438,7 +438,7 @@
438 438  
439 439  **Error checking**
440 440  
441 -If the LX3V-4AD special function block does not seem to operate normally, check the following items.
342 +* If the LX3V-4AD special function block does not seem to operate normally, check the following items.
442 442  
443 443  Check the status of the POWER LED.
444 444  
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