6/5/2016 11:47 AM | |
Posts: 4 Rating: (2) |
Hello, starting from this base (link), I added an additional step to change the address of device and read cyclically other six plc S7-1200, and everything works properly. The problem is that if only one of my seven plc is offline, the module MB_Master goes into Busy and not reads the others devices that are yet online... how can I unlock the MB_MASTER from Busy to continue to read the devices that are still online, in case one is offline? Thanks bye P.S.: Sorry for my google english :( |
6/5/2016 12:05 PM | |
Posts: 5225 Rating: (1185) |
Possible options: Is there any particular reason you are using Modbus RTU to link the S7-1200 PLCs? Did you know you can use the Ethernet port to link the CPUs to each other? w |
This contribution was helpful to1 thankful Users |
6/5/2016 12:25 PM | |
Posts: 4 Rating: (2) |
Thanks for the quick reply, the reason of the modbus RTU is the simplicity of the wiring, being the distance between the plc exceeding 100 meters. The problem is that once I read the error / timeout not know how to stop the busy in MB_MASTER? Simply changing the Modbus address. the block remains in busy thanks bye bye |
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