Emerson Process Management 3-9000-522 Manual Do Utilizador

MODBUS TEST 

10-7

MON2000

JULY 2010

 Getting Modbus Data

Use the following steps to read or write register 

contents to the GC Controller (or any other 

device). See the following subsections for 

additional details. 

Before retrieving data, print a PC Config 

) and check the 

Communication data for variable names 

assigned to the Modbus registers.

1. In the Slave Addr data field, type the Comm 

ID of the GC unit (or other device). WinMB 

will accept a slave address of 1 to 247.
Enter “0” to use the broadcast mode. In the 

broadcast mode, WinMB polls all known 

devices. Each device interprets this message 

as an instruction to read and take action; 

however, a response message may not be 

received by WinMB.