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<p>Hi,
<p>I'm having a big headache with a communication problem with Modbus network.
I have 2 (RS232) PLCs connected to an (RS485) Exter K70 HMI in a multidrop network with the K70 as Master. 2 PLCs use RS232/485 Electro Industries converters. Well, everything works fine when the RS232 cable is unplugged from Station 2 and then plugged back. But when Station 1 is disconnected and replugged, the communication does not get restored unless the HMI is restarted. Any help would be much appreciated.
<pre>
PLC 1 ---[Unicom 2500] == [Unicom 2500] --- PLC 2
||
||
[exter k70]
</pre>
<p>I'm having a big headache with a communication problem with Modbus network.
I have 2 (RS232) PLCs connected to an (RS485) Exter K70 HMI in a multidrop network with the K70 as Master. 2 PLCs use RS232/485 Electro Industries converters. Well, everything works fine when the RS232 cable is unplugged from Station 2 and then plugged back. But when Station 1 is disconnected and replugged, the communication does not get restored unless the HMI is restarted. Any help would be much appreciated.
<pre>
PLC 1 ---[Unicom 2500] == [Unicom 2500] --- PLC 2
||
||
[exter k70]
</pre>
