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Last modified by Theodore Xu on 2024/04/10 09:11
From version 35.1
edited by Theodore Xu
on 2024/02/18 11:00
Change comment: There is no comment for this version
To version 31.1
edited by Leo Wei
on 2023/12/29 09:51
Change comment: There is no comment for this version

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1 -XWiki.AiXia
1 +XWiki.admin
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25 25  
26 26  **RS485 Connection Topology**
27 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.
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 29  
30 30  **Multi-node connection mode**
31 31  
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51 51  
52 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 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 59  |Transmission distance (m)|Rate (kbps)|Number of nodes|Wire diameter
60 60  |100|115.2|128|AWG26
61 61  |1000|19.2|128|AWG26
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66 66  
67 67  (% class="box infomessage" %)
68 68  (((
69 -**✎Note:VM series manufactured after April 2023 can support this feature！**
64 +**✎Note:VM series manufactured after April 2023 can support this feature！！**
70 70  )))
71 71  
72 72  NPN/PNP switching has been added to the VM series machines, enabling fast switching between the two modes.
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258 258  (% style="text-align:center" %)
259 259  [[image:Three-wire control mode 2.png||height="332" width="436"]]
260 260  
261 -**Among them: **SB1 Stop button;SB2 Forward and reverse control buttons; SB3 Run button;
256 +**Among them: **SB1 Stop button;SB2 Reverse and reverse control; buttons SB3 Run button;
262 262  
263 263  Refer to the following table for running commands corresponding to switching signals:
264 264