Dear Sir,

Myself Gufran i am having a problem communicating micrologix 1100 with Stahl HMI using modbus serial. i configure micrologix for CH0 as Modbus RTU Master and used the messaging programming. yet not getting any read or write messages.

E_mail -: gufranahmad06 [at] gmail.com
In messaging i configured for controller
CH0,
modbus command:03
read holding Reg.(4xxxxx).
Data Table Address: N7:0
Size in Element: 10
For Target Device
Message Timeout:10
MB data Address : 1
Slave node address:1
Modbus Address: 40001

for continuous messaging i used timer. So no error bit generating and no DONE bit is going HIGH.
plc has 2 channel 1. serial 2. Ethernet.

i used ethernet for PC to plc and serial port is used for PLC to HMI(HMI doesn't have other port.

what i have to do please Reply me.
Thanks and Regards
Gufran

 

Have you tried OPC for this? Here is an OPC server for MicroLogix: http://is.gd/fn92A

if you still wanna use Modbus here is an OPC server for Modbus: http://is.gd/erKFG

Wassim Daoud
Global Solutions Architect