Micromod MOD: 30MLTraining Manual - Manual (Page 203)

Training Manual
Supervisory Message Lab
B – ADD THE SUPERVSIORY MESSAGE BLOCK
1. Select SM (Supervisory Message) from the Algorithm window
and place it near the PID block.
2. Open the SM block and give it the following tag name and
description:
Name: A/M
Description: mode change signal from sequence block
3. Change the Data Type to Short State using the pull-down menu
This block will change the controller mode
based on the sequence step. Controller
mode is a short-state variable.
4. Click on the Message tab. Notice that the default Message Type
is ‘Set’.
There are several message types that can
be sent by the Supervisory Message block.
To change a control mode we need to use
the SET command.
5. Click OK to close the block.
6. Select the Multi-Segment connector from the Algorithm window,
and click on the PID block.
7. Select the attribute OPMS from the connection window
8. Drag the cursor to the SM block and select it
9. Click on SETENTRY in the connection window. The connection between the SM block and
the block receiving the SET command
actually goes from the destination block to
the SM block, and appears to be
“backward”.
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