Honeywell UMC800 Reference Manual page 205

2.62 SPSA Function Block,
Block Properties
Double click on the function block to access the function block properties dialog box.
Block Order (Read Only)
You can change the assigned execution order number by selecting "Execution Order" in the "Configure"
menu and arrange the order to suit your control strategy.
Example
Figure 2-68 shows a Function Block Diagram (Setpoint Scheduler Suite) using a SPSA function block.
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Function Block Reference Guide
Function Blocks
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