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Last modified by Theodore Xu on 2024/04/10 09:11
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1 == **Modbus** ==
2
3 **Communication specifications**
4
5 |(% colspan="2" %)Item|Content
6 |(% colspan="2" %)Communication protocol|Modbus protocol
7 |(% colspan="2" %)Standard specifications|Modbus-RTU slave station communication protocol
8 |(% colspan="2" %)Maximum connections|247
9 |(% colspan="2" %)Topological structure|Bus type
10 |Slave station function|Number of messages that can be received and requested at the same time|1
11
12 **Hardware configuration**
13
14 |Terminal identification|Terminal name|Function description|Jumper/dialing position
15 |J5|485 communication terminal resistance setting jumper|Match terminal resistance|(((
16 (% style="text-align:center" %)
17 [[image:modbus 跳线帽.png]]
18 )))
19
20 Modbus communication port of this product is located on the control panel, as shown in the following figure:
21
22
23 (% style="text-align:center" %)
24 [[image:modbus 电路.png]]
25
26 **RS485 Connection Topology**
27
28 RS485 bus connection topology is shown in the following figure. 485 bus is recommended to use shielded twisted pair (STP), 485+, 485-: **Adopt twisted pair to connect**; Only 120 Ω terminal matching resistors are connected at both ends of the bus to prevent signal reflection; All node 485 signal grounds are connected together; Connect 128 nodes at most, and the distance between branches of each node should be less than 3m.
29
30 **Multi-node connection mode**
31
32 When the number of nodes is large, 485 bus must be daisy chain connection. If branch connection is needed, the branch length from bus to node had better be short. It is recommended that it should not exceed 3m. **Star connection should be forbidden**. The diagram of common bus structure is as follows:
33
34 Figure1 Daisy chain connection
35
36 (% style="text-align:center" %)
37 [[image:菊花链接.png||alt="Daisy chain connection"]]
38
39 Figure2 Branch connection
40
41 (% style="text-align:center" %)
42 [[image:分支链接.png]]
43
44 Figure3  Star connection **(Forbidden) **
45
46 (% style="text-align:center" %)
47 [[image:星型链接.png]]
48
49
50 **Transmission distance**
51
52 The maximum number of nodes and transmission distance supported by our standard RS485 circuit at different rates are shown in the following table.
53
54 The communication distance between the inverter and other devices should not exceed **200 meters**, if it exceeds two hundred meters it may cause unstable communication. If the communication distance **exceeds 200 meters**, the following measures need to be included:
55
56 * Communication cable：Adopt twisted pair to connect
57 * anti-interference magnetic ring
58
59 |Transmission distance (m)|Rate (kbps)|Number of nodes|Wire diameter
60 |100|115.2|128|AWG26
61 |1000|19.2|128|AWG26
62
63 == **PNP/NPN** ==
64
65 === **VM series** ===
66
67 (% class="box infomessage" %)
68 (((
69 **✎Note:VM series manufactured after April 2023 can support this feature！**
70 )))
71
72 NPN/PNP switching has been added to the VM series machines, enabling fast switching between the two modes.
73
74
75 (% style="text-align:center" %)
76 [[image:原理图.png]]
77
78 The NPN/PNP mode can be switched manually at the illustration to realize the compatibility of external signals. Where the upper two pins are shorted for NPN, the lower two pins are shorted for PNP mode.
79
80 **Product model**
81
82 0.75~~2.2(KW)
83
84 (% style="text-align:center" %)
85 [[image:VM小功率.png]]
86
87 (% class="wikigeneratedid" id="H47E7.528KW29" %)
88 4~~7.5(KW)
89
90 (% style="text-align:center" %)
91 [[image:VM大功率.png]]
92
93 (% class="wikigeneratedid" id="HVMPNPmode" %)
94 **VM PNP mode**
95
96 (% style="text-align:center" %)
97 [[image:VM pnp 改.png||height="406" width="1099"]]
98
99 (% class="wikigeneratedid" id="HVMNPNmode" %)
100 **VM NPN mode**
101
102 (% class="box infomessage" %)
103 (((
104 **✎Note:VM NPN external DC does not suppot.**
105 )))
106
107 (% style="text-align:center" %)
108 [[image:VM PNP 内部改.png]]
109
110 === **VB series** ===
111
112 The control signals of VB series products are compatible with both NPN and PNP signal types.
113
114 |= |=**Low-power model**|=**High-power model**
115 |Adapted power|(((
116 220V：0.75-2.2kW
117
118 380V：0.75-7.5kW
119 )))|380V：11-400kW
120 |NPN signal|Default Compatible|Default Compatible
121 |PNP signal|Add expansion board|(((
122 Changing OP terminal
123 )))
124
125 Add an expansion card for PNP signal compatibility for small control board.
126
127 (% class="wikigeneratedid" id="HIntroduceofexpansionmodule" %)
128 **Introduce of expansion module**
129
130 (1)Name：PNP signal compatible expansion board
131
132 (2)Picture：
133
134 (% style="text-align:center" %)
135 [[image:PNP 模块.png]]
136
137 (3)Application Principle：**VB 0.75kW-7.5kW PNP mode**
138
139 (% style="text-align:center" %)
140 [[image:VB 小功率 PNP.png]]
141
142 **VB 0.75kW-7.5kW NPN mode**
143
144 (% class="box infomessage" %)
145 (((
146 **✎Note:VB 0.75kW-11kW NPN external DC does not suppot.**
147 )))
148
149 (% style="text-align:center" %)
150 [[image:VB 小功率NPN 改.png]]
151
152 **VB 11kW-400kW PNP mode**
153
154 (% style="text-align:center" %)
155 [[image:VB 大功率 PNP 改1.1.png||height="395" width="1113"]]
156
157 **VB 11kW-400kW NPN mode**
158
159 (% style="text-align:center" %)
160 [[image:VB 大功率 NPN 改.png||height="399" width="1082"]]
161
162 == **VB wiring instructions for common control methods** ==
163
164 （1）Two-wire type 1 mode controls forward and reverse rotation
165
166 |**Correlation parameter**|**Name**|**Set value**|**Function description**
167 |F5.16|(((
168 Terminal
169
170 command mode
171 )))|0|Two-wire type 1
172 |F5.00|(((
173 DI1 Terminal
174
175 Function Selected
176 )))|1|Forward running（ FWD）
177 |F5.01|(((
178 DI2 Terminal
179
180 Function Selected
181 )))|2|Reverses run（ REV）
182
183 **Two-wire mode 1**: This mode is the most commonly used two-wire mode. For example, the DI1 terminal is assigned the forward running function, and the DI2 terminal is assigned the reverse running function. Connect the forward running switch to DI1 terminal and the reverse running switch to DI2 terminal.
184
185 (% style="text-align:center" %)
186 [[image:Two-wire mode 2图片.png||height="310" width="407"]]
187
188 Refer to the following table for running commands corresponding to switching signals:
189
190 |**K1**|**K2**|**Run command**
191 |0|0|STOP
192 |1|1|STOP
193 |1|0|Forward running
194 |0|1|Reverses running
195
196 （2）Two-wire type 2 mode controls forward and reverse rotation
197
198 |**Correlation parameter**|**Name**|**Set value**|**Function description**
199 |F5.16|(((
200 Terminal
201
202 command mode
203 )))|1|Two-wire type 2
204 |F5.00|DI1 Terminal Function    Selected|1|Run command
205 |F5.01|DI2 Terminal Function    Selected|2|Forward and reverse direction
206
207 Two-wire mode 2:In this mode,the DI1 terminal assigns the command function, and the DI2 terminal assigns the forward and reverse direction function.
208
209
210 (% style="text-align:center" %)
211 [[image:Two-wire mode 2图片.png||height="326" width="428"]]
212
213 Refer to the following table for running commands corresponding to switching signals:
214
215 |**K1**|**K2**|**Run command**
216 |0|0|STOP
217 |0|1|STOP
218 |1|0|Forward running
219 |1|1|Reverses running
220
221 （3）Three-wire type 1 mode controls forward and reverse rotation
222
223 |**Correlation parameter**|**Name**|**Set value**|**Function description**
224 |F5.16|(((
225 Terminal
226
227 command mode
228 )))|2|Three-wire type 1
229 |F5.00|DI1 Terminal Function    Selected|1|Forward running（ FWD）
230 |F5.01|DI2 Terminal Function    Selected|2|Reverses run（ REV）
231 |F5.02|DI3 Terminal Function    Selected|3|Three-wire operation control
232
233 Three-wire control mode 1: In this mode,the DI3 terminal allocates the three-wire operation control function, the DI1 terminal allocates the forward operation function, and the DI2 terminal allocates the reverse operation function. This control mode requires the frequency converter to use an external button as the start-stop switch of the inverter. Connect the start-stop button to DI3 terminal, the forward running button to DI1 terminal, and the reverse running button to DI2 terminal.
234
235
236 (% style="text-align:center" %)
237 [[image:Three-wire control mode 1.png||height="328" width="431"]]
238
239 **Among them: **SB1 forward button; SB2 reverse button; SB3 Stop button;
240
241 （4）Three-wire type 2 mode controls forward and reverse rotation
242
243 |**Correlation parameter**|**Name**|**Set value**|**Function description**
244 |F5.16|(((
245 Terminal
246
247 command mode
248 )))|3|Three-wire type 2
249 |F5.00|DI1 Terminal Function    Selected|1|Run command
250 |F5.01|DI2 Terminal Function    Selected|2|Forward and reverse direction
251 |F5.02|DI3 Terminal Function    Selected|3|Three-wire operation control
252
253 Three-wire control mode 2: For example, the DI3 terminal allocates the three-wire running control function, the DI1 terminal allocates the command function, and the DI2 terminal allocates the forward/reverse running direction function. Connect the start-stop button to DI3 terminal, and enable the operation to connect to DI1 terminal; Connect the forward/reverse operation button to the DI2 terminal.
254
255 (% style="text-align:center" %)
256 [[image:Three-wire control mode 2.png||height="332" width="436"]]
257
258 **Among them: **SB1 Stop button;SB2 Forward and reverse control buttons; SB3 Run button;
259
260 Refer to the following table for running commands corresponding to switching signals:
261
262 |SB2|Run command
263 |0|Forward running
264 |1|Reverses running