Evan.rice44
Lifetime Supporting Member
I am currently working on a project with an Epson Scara robot using an RC-90 controller communicating with a ML1400 Ser. B PLC. The robot controller comes with Modbus RTU and TCP standard so I decided to use a Micrologix instead of purchasing an Ethernet IP card and using a Compactlogix. I have tried to set the system up via Modbus TCP (using a MSG(following a method Bernie posted) to read then write using the DN bit of the read) but I can only get the PLC write to the robot and not Read. I the dealt with Epson tech support for hours but they were lost also, being that the problem seems to be on the PLC end. I downloaded a Modbus testing program (simply Modbus 8.1) to verify that and sure enough, the robot controller has no problem reading and writing to my PC.
I then tried to use Modbus RTU, thinking that would be easier to get SOMETHING working, I was wrong. I have tried changing everything I could think to do but I just cant seem to find what I'm doing wrong. I would really appreciate any help on this matter. I will post both programs (TCP setup, and RTU setup) and some screenshots on the robot setup environment.
Thanks Again
I then tried to use Modbus RTU, thinking that would be easier to get SOMETHING working, I was wrong. I have tried changing everything I could think to do but I just cant seem to find what I'm doing wrong. I would really appreciate any help on this matter. I will post both programs (TCP setup, and RTU setup) and some screenshots on the robot setup environment.
Thanks Again