I am looking for a way to record data from a control system that uses an Allen-Bradley processor. The Allen-Bradley processor has a Channel 0 that communicates with RS232.
Does anyone know if a CR1000 or CR6 will be able to read data from the Allen-Bradley processor over the RS232 connection?
Thank you!
The CR1000 and CR6 can establish an RS-232 connection with most devices - as long as the device's RS-232 implementation is close to the standards. The real issue, however is having a knowledge of what data/bits/bytes to send back and forth over that communications link.
I think the relevant protocol is called DF1. The CR1000/CR6 do not support the DF1 protocol natively. So you would have to write a big custom program to implement the protocol yourself in CRBasic code modules. Though possible that would be a lot of work.
Perhaps a better route would be to explore ModBus or DNP3.
The CR1000/CR6 support those protocols natively. Is there a protocol converter that would convert DF1 to ModBus ?
DF1 protocol
http://en.wikipedia.org/wiki/DF-1_Protocol
http://literature.rockwellautomation.com/idc/groups/literature/documents/rm/1770-rm516_-en-p.pdf
http://downloadt.advantech.com/ProductFile/Downloadfile1/1-MRMNV0/AB-PLC5_Serial.pdf
http://broadwin.com/downloads/pdf/AB_SLC5_Serial.pdf