Micromod MOD: 30MLTraining Manual User Manual
Page 88
Training Manual
PID Loop Lab
4.
Let us first configure a scan group:
There could be as many as five scan groups in an instrument database. The control
loops (database blocks connected together) are grouped into Loop Compounds. The
Loop Compounds can be assigned to any of these scan groups. All the blocks and
compounds in a particular scan group will be executed at the same scan rate configured
for the group.
This way you can have many loops in the database and they can be executed at different
rates depending on their priority and speed of the process they are controlling.
• Notice that all the four blocks on the screen are selected. Deselect them by clicking
on a blank space and then double-click on the IF (Interface) block. The Interface
block will open as shown in the next figure: The block is displayed in a visual
notebook format, with tabbed “pages” containing the parameters for configuration.
The Execution tab (page) of this block will be displayed by default.
Figure 6 .11.
IF Block
• Change the Group 1 scan interval from 250 ms to 200 ms by typing in the ms field
of Scan Intervals:Group 1.
Notice that the Properties menu of the block has the following tabs:
• Execution
• Startup
• Diagnostics
• Incoming
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