I have acquired a HomeTroller SEL primarily to use as a Modicon master for monitoring mostly digital inputs on a Click PLC. I have installed the trial Modbus plugin but have had no luck in getting it to communicate with the Click.
Since I already had a USB to RS-232 converter and the Click supports RS-232 Modbus on port 2 and I am only interested in communicating with one Modbus slave, this is the configuration I have chosen.
Com port chosen: /dev/ttyUSB0.
Both ports set to 9600, odd, 1 stop bit. I have also enabled zero based addressing (based on earlier thread on Click addressing issues).
For initial testing, I am trying to read a single input, but only get status of unreachable on the RTU gateway plug-in and no change in status for the bit monitored.
The log reads:
Oct-08 11:07:29 AM Modbus Warning Gateway [Modbus RTU Gateway] is disabled, not initialising transport
Oct-08 11:07:29 AM Modbus Error Error initialising serial port: Cannot find the requested class member.
Oct-08 11:07:29 AM Device Control Device: Modbus System Modbus RTU Gateway to Enable (1) by/from: CAPI Control Handler
Questions:
- Is this RS-232 Modbus supported by the plug-in?
- Is there some driver I need to tell the USB port it needs to communicate via RS-232?
- What does "unreachable" mean exactly. Is this a plug-in software configuration issue or is my USB to RS-232 converter not compatible?
- If not, can you suggest a compatable USB to RS-232 converter?
I have exhausted all my ideas and am looking for some suggestions to try.
Since I already had a USB to RS-232 converter and the Click supports RS-232 Modbus on port 2 and I am only interested in communicating with one Modbus slave, this is the configuration I have chosen.
Com port chosen: /dev/ttyUSB0.
Both ports set to 9600, odd, 1 stop bit. I have also enabled zero based addressing (based on earlier thread on Click addressing issues).
For initial testing, I am trying to read a single input, but only get status of unreachable on the RTU gateway plug-in and no change in status for the bit monitored.
The log reads:
Oct-08 11:07:29 AM Modbus Warning Gateway [Modbus RTU Gateway] is disabled, not initialising transport
Oct-08 11:07:29 AM Modbus Error Error initialising serial port: Cannot find the requested class member.
Oct-08 11:07:29 AM Device Control Device: Modbus System Modbus RTU Gateway to Enable (1) by/from: CAPI Control Handler
Questions:
- Is this RS-232 Modbus supported by the plug-in?
- Is there some driver I need to tell the USB port it needs to communicate via RS-232?
- What does "unreachable" mean exactly. Is this a plug-in software configuration issue or is my USB to RS-232 converter not compatible?
- If not, can you suggest a compatable USB to RS-232 converter?
I have exhausted all my ideas and am looking for some suggestions to try.
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