69FIREBIRD
Member
Hi all, I have a project where I am going to be talking to a power revenue meter via Modbus with a Micrologix 1100 and 1763-NC01 on channel 1.
I have received the meter specs and it advises that it is a 4 wire RS485 comms configuration. The Micrologix 1100 is a 2 wire RS485 configuration.
How do I hook this up? -
- Can I hook up just one pair on the 4 wire RS485?
- Can I parallel up pairs of the 4 wire connection and connect the paralleled pair to the 2 wire terminations on the 1763-NC01?
- Do I need a signal converter between the to RS485 if so what works?
- Any other options?
Appreciate your feedback.
PS the modbus registers come in as floating point and cover two registers per variable. How can I tie these together in the PLC to get the actual valve?
I have received the meter specs and it advises that it is a 4 wire RS485 comms configuration. The Micrologix 1100 is a 2 wire RS485 configuration.
How do I hook this up? -
- Can I hook up just one pair on the 4 wire RS485?
- Can I parallel up pairs of the 4 wire connection and connect the paralleled pair to the 2 wire terminations on the 1763-NC01?
- Do I need a signal converter between the to RS485 if so what works?
- Any other options?
Appreciate your feedback.
PS the modbus registers come in as floating point and cover two registers per variable. How can I tie these together in the PLC to get the actual valve?