Interfacing AB Micro830 with Computer using generic RS232 cable

[THED]

Hi, I found the proper software to make my hmi, however, I am having trouble with making my PLC talk to the software via modbus RTU. Do you guys know any other solutions other than paying ridiculous amount of money to buy the opc to modbus servers? Thanks.

[unclebump]

You can use the NI Modbus library, it handles all of the communications in the background. You just tell it what registers to read and how many. You can download a demo of the Kepware program, it will run for two hours at a time. Then just close it and restart it.

[THED]

Where is the NI modbus library ?

[unclebump]

http://sine.ni.com/nips/cds/view/p/lang/en/nid/201711

http://zone.ni.com/devzone/cda/epd/p/id/4756