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Hi. I searched many forums but couldn't find an answer anywhere. I am trying to connect the Wago pfc200 750-8212 controller to the air handling unit. When I was configuring the MOdbus RTU connection in eCockpit everything worked. When I want to do the same in Codesys I get a message that the port is not working. Maybe the reason is not setting communication via rs485? But I don't know where it is set.
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The problem with no response within the specified time has disappeared. Instead, the error "Request_crc_fail" appeared. What could be the cause of the checksum error.
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Hi. I searched many forums but couldn't find an answer anywhere. I am trying to connect the Wago pfc200 750-8212 controller to the air handling unit. When I was configuring the MOdbus RTU connection in eCockpit everything worked. When I want to do the same in Codesys I get a message that the port is not working. Maybe the reason is not setting communication via rs485? But I don't know where it is set.
If you are on PFC200 SL in the plcshell + restart the device
Thank you, I changed to rs485 but it still doesn't work.
Does anyone have any idea why this port is not working? What should be the entry in /etc/CODESYSControl.cfg [SysCom] ?
PFC side is ok, check your slave side..copy the slave name to the watch window to see the diagnosis of the fb
The message changes every few seconds.
The problem with no response within the specified time has disappeared. Instead, the error "Request_crc_fail" appeared. What could be the cause of the checksum error.
either wiring or end resistor on RS485