[?]: How to read Quantum Unity status registers %S?

leofarhan · Post by **leofarhan** » Tue Apr 20, 2010 7:13 pm

Hi All!

I need to read the system bits & words (from Quantum Unity Hotstandby PLCs) at my SCADA/HMI using ModBus TCP/IP protocol without moving system registers to memory registers.

I think so it is possible, because I have read the status registers of TWIDO PLC in the XBTGT using ModBus TCP/IP. The XBTGT have option to read system registers %S & %SW, but my SCADA have option to read 0X, 1X, 3X, 4X registers.

Hope there will be someone who will guide me.

Regards

Leo-Ali