Rockwell Automation 1756-CFM ControlLogix Configurable Flowmeter Module - Manual (Page 88)

88 Rockwell Automation Publication 1756-UM010B-EN-P - December 2011
88 Configuring the Configurable Flowmeter Module
Changing Configuration
During CFM Module
Operation
After the CFM module has begun operation, you can only change
configuration by using ladder logic and message instructions.
Follow these steps to change CFM module configuration during operation:
1. Access the CFM data structures through the tag monitor to make
specific configuration changes, see page 85 .
2. Use ladder logic and a configuration message instruction to send the
configuration changes to the CFM module, see below through page 94 .
Using Ladder Logic
You must use ladder logic to perform the following operations on your CFM
module:
 change configuration
 perform run time services
Ladder logic uses message instructions to exchange data between the
controller and CFM module. You can access the ladder logic by
double-clicking on the Main Routine portion of the MainProgram.
Double-click here to
enter the Main Routine