7 Modbus RTU
7.1 General
DE1 variable speed starter
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113
7.1.2 COM Port
The DE1 variable speed starter's front RJ45 interface supports the Modbus
RTU protocol and, accordingly, a direct network connection without the need
for an additional interface module.
A bus termination resistor
③
with a resistance of approx.
120
Ω
needs to
be connected at the physical end (last module) of the Modbus network in
order to prevent signal reflection and the associated transmission errors.
figure 74: Pin assignment for RJ45 socket
7.1.3 Enable
If using Modbus, there must always be a "HIGH" signal at DI1.
figure 75: Connection examples for Modbus-based operation
7.1.4 Data format
The data format for DE1 variable speed starters is fixed and cannot be
changed.
•
1 start bit
•
8 data bits
•
1 stop bit
•
No parity
Pin
Meaning
1
not assigned
2
not assigned
3
0 V
4
OP bus (operation bus) / External keypad / PC connection -
5
OP bus (operation bus) / External keypad / PC conn
6
24 V DC power supply
7
RS485- Modbus RTU (A)
8
RS485+ Modbus RTU (B)
1
2
3
4
5
6
7
8
1
+10 V
DI1
1
+10 V
DI1
1
+24 V
DI1
0 V
Содержание PowerXL DE1 series
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Страница 68: ...3 Installation 3 6 Block diagrams 64 DE1 variable speed starter 09 14 MN040011EN www eaton com ...
Страница 132: ...7 Modbus RTU 7 4 Operating mode Modbus RTU 128 DE1 variable speed starter 09 14 MN040011EN www eaton com ...
Страница 146: ...8 Technical Data 8 4 Dimensions 142 DE1 variable speed starter 09 14 MN040011EN www eaton com ...
Страница 172: ...10 Fault messages 10 3 Fault list 168 DE1 variable speed starter 09 14 MN040011EN www eaton com ...
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