mainstreetmark
Member
I've been stuck on an issue for a few hours now and the in-house expert is out at the hospital so I have to solve this on my own this time:
On the PLC, both err1 and err2 lights are on. I'm not using port 1, so err1 doesn't frighten me. On port2, I have a RS485 mini network set up which is nothing more than the connector, a 3-conductor interface, and the modbus device in question ( a Basler generator monitor).
- Yes, the jumpers on the 3150 are set to 485
- Yes, there is a terminating resister
- Yes, I tried port 1
- Yes, (i'm told) the setup in RSLogix is right, as it's been copied from previous projects which worked.
The MCM error file gives me an 8, which is a Timeout Error, and according to the manual, that already eliminates port and configuration issues (which are 16 and 18).
The crappy little 3-conductor cable I use passes my ohmmeter test, so it's a good cable.
Can anyone give me a push?
On the PLC, both err1 and err2 lights are on. I'm not using port 1, so err1 doesn't frighten me. On port2, I have a RS485 mini network set up which is nothing more than the connector, a 3-conductor interface, and the modbus device in question ( a Basler generator monitor).
- Yes, the jumpers on the 3150 are set to 485
- Yes, there is a terminating resister
- Yes, I tried port 1
- Yes, (i'm told) the setup in RSLogix is right, as it's been copied from previous projects which worked.
The MCM error file gives me an 8, which is a Timeout Error, and according to the manual, that already eliminates port and configuration issues (which are 16 and 18).
The crappy little 3-conductor cable I use passes my ohmmeter test, so it's a good cable.
Can anyone give me a push?