PLCs, Controller & DCS
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Jun 25, 2024 10:31 am
There seems to be a known issue with communicating between a Micro850 and Panelview800 via RS-232, especially with newer L50E controllers. Here's how to troubleshoot the problem:
- Check Communication Settings:
- Verify that the serial port settings on both the Micro850 and Panelview800 match exactly. This includes:
- Baud Rate (e.g., 9600)
- Data Bits (e.g., 8)
- Parity (e.g., None)
- Stop Bits (e.g., 1)
- Flow Control (e.g., None)
- Double-Check Hardware:
- Ensure you're using a null modem cable for RS-232 communication.
- Replace the RS-232 cable to eliminate the possibility of a faulty cable.
- Try connecting the devices with a different Micro850 and Panelview800 (if available) to isolate the problem to a specific unit.
- Consider Firmware Compatibility:
- While newer L50E controllers might have implicit messaging features, RS-232 communication with Panelview800 might require a specific firmware version on the Micro850. Consult the Rockwell Automation documentation for compatible firmware versions for both devices.
- Explore Alternatives to RS-232:
- Although less common, some Micro850 models might support Ethernet communication. This can be a more reliable alternative to RS-232.
- Check the specific models you're using for available communication options.