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Last modified by Theodore Xu on 2024/04/10 09:11
From version 1.1
edited by Theodore Xu
on 2023/11/27 17:12
Change comment: There is no comment for this version
To version 3.1
edited by Theodore Xu
on 2023/11/27 17:33
Change comment: There is no comment for this version

Summary

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1 -**1.Communication specifications**
1 +== 1.Modbus ==
2 2  
3 +**Communication specifications**
4 +
3 3  |(% colspan="2" %)Item|Content
4 4  |(% colspan="2" %)Communication protocol|Modbus protocol
5 5  |(% colspan="2" %)Standard specifications|Modbus-RTU slave station communication protocol
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7 7  |(% colspan="2" %)Topological structure|Bus type
8 8  |Slave station function|Number of messages that can be received and requested at the same time|1
9 9  
10 -**2. Hardware configuration**[[image:file:///C:\Users\Administrator\AppData\Local\Temp\ksohtml8080\wps1.png]]
12 +**Hardware configuration**
11 11  
12 12  |Terminal identification|Terminal name|Function description|Jumper/dialing position
13 13  |J5|485 communication terminal resistance setting jumper|Match terminal resistance|(((
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29 29  
30 30  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:
31 31  
34 +Figure1 Daisy chain connection
35 +
32 32  (% style="text-align:center" %)
33 33  [[image:菊花链接.png||alt="Daisy chain connection"]]
34 34  
39 +Figure2 Branch connection
35 35  
36 36  (% style="text-align:center" %)
37 37  [[image:分支链接.png]]
38 38  
44 +Figure3  Star connection **(Forbidden) **
45 +
39 39  (% style="text-align:center" %)
40 40  [[image:星型链接.png]]
41 41  
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 +|Transmission distance (m)|Rate (kbps)|Number of nodes|Wire diameter
55 +|100|115.2|128|AWG26
56 +|1000|19.2|128|AWG26
57 +
58 +== 2.PNP/NPN ==
59 +
60 +=== VM series ===
61 +
62 +(% class="box infomessage" %)
63 +(((
64 +✎Note:VM series manufactured after April 2023 can support this feature.
65 +)))
66 +
67 +NPN/PNP switching has been added to the VM series machines, enabling fast switching between the two modes.
68 +
69 +
70 +(% style="text-align:center" %)
71 +[[image:原理图.png]]
72 +
73 +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.
74 +
75 +**Product model**
76 +
77 +0.75~~2.2(KW)
78 +
79 +(% style="text-align:center" %)
80 +[[image:VM小功率.png]]
81 +
82 +4~~7.5(KW)
83 +
84 +(% style="text-align:center" %)
85 +[[image:VM大功率.png]]
86 +
87 +
VM大功率.png
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