1756-PM003H-EN-E, SFC and ST Programming Languages ...

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$Course Material\Efficiently Coding Communication Protocols in C++ ...$

13-4 Force Logic Elements This: Enabled Disabled Installed None Installed Means: • If the project contains any forces of this type, they are overriding your logic. • If you add a force of this type, the new force immediately takes effect Forces of this type are inactive. If the project contains any forces of this type, they are not overriding your logic. At least one force of this type exists in the project. No forces of this type exist in the project. Publication 1756-PM003H-EN-E (excerpt from 1756-PM001H-EN-P) - August 2005
Force Logic Elements 13-5 FORCE LED If your controller has a FORCE LED, use the LED to determine the status of any I/O forces. IMPORTANT The FORCE LED shows only the status of I/O forces. It does not show that status of SFC forces. If the FORCE LED is: off flashing solid Then: • No tags contain force values. • I/O forces are inactive (disabled). • At least one tag contains a force value. • I/O forces are inactive (disabled). • I/O forces are active (enabled). • Force values may or may not exist. GSV Instruction IMPORTANT The ForceStatus attribute shows only the status of I/O forces. It does not show the status of SFC forces. This example shows how to use a GSV instruction to get the status of forces. where: Force_Status is a DINT tag. To determine if: Examine this bit: For this value: forces are installed 0 1 no forces are installed 0 0 forces are enabled 1 1 forces are disabled 1 0 Publication 1756-PM003H-EN-E (excerpt from 1756-PM001H-EN-P) - August 2005
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