transfer data stream into PLC
transfer data stream into PLC
(OP)
Hi every body,
I would like to know how to transfer data stream from analytical instrument RS-232, Modbus RTU protocol into a Modicon PLC. What SOFTWARE should I use to program the PLC for it to collect data into the registers? Thanks.
Claude
I would like to know how to transfer data stream from analytical instrument RS-232, Modbus RTU protocol into a Modicon PLC. What SOFTWARE should I use to program the PLC for it to collect data into the registers? Thanks.
Claude





RE: transfer data stream into PLC
Does your modicon have MB+? It would be posable to install a bribge mux.
Does your inst suport master mode? Where it can write or is it only a slave? Some times on inst such as you may have, ther is a print option to feed data out.
RE: transfer data stream into PLC
- The inst havs a MB interface board (RTU protocol on an RS-485 two wire connection at 9600 bauds) where the data is placed in 16 bit unsigned registers.
RE: transfer data stream into PLC
There is a modbus II card witch can be installed, along with an software loadable to work past this. These cost about $2k.
But there is a better product BM85S, this device will add four rs232 or RS484 ports to a MB+ network. Then each device will appear as an MB+ node and MSTR will work fine.
These cost about $2k. I have used many of these and found them very easy to use.
Seems like you would think a modicon PLC would be able to establish modbus host read and write Messages to otter modbus devices, But when I have asked about this they always say we are working on a loadable that is not available yet.