System Projects Reference > Situational Awareness System Projects > Situational Awareness Library Project > Associate PLC Limits with Equipment
Associate PLC Limits with Equipment

To associate PLC alarm limits with a piece of equipment:

  1. Define the PLC limit names to use. For more information about the parameters that need to be configured for setting up PLC alarm limits, refer to the Parameters help.
  2. In Citect Studio, navigate to System Model activity | Equipment.
  3. Select Runtime Parameters from the dropdown menu.
  4. For each equipment, in the Name property, type PLCLimits.
  5. In the Value property, specify your comma-separated list of default PLC limits, that is the order in which the defined PLC alarm limits need to be used.

Note: Setting the Value property to * reverses the setting of the UseDefaultPLCLimits parameter. Therefore, if the UseDefaultPLCLimits parameter is set to TRUE, it will be reversed and applied as if it were set to FALSE. In this example, analog alarm limits will apply. If UseDefaultPLCLimits is FALSE, setting the value of the runtime parameter to * will cause the associated equipment to use the default PLC limits defined at the project level.

  1. Set the IsTag property to FALSE so that the PLC limit labels are displayed on the meter faceplates.
  2. Click Save.
ClosedExample

This example provides the steps for adding PLC alarm limit values for equipment.

  1. In the Equipment Editor, locate the equipment template for the equipment to which you want to add PLC alarm limits and add the following items. These items will be generated for all equipment based on this template. Alternatively, in the System Model Activity, Variables view, add the following tags (item names):
  1. If you have modified the template, use the File, Update Equipment option to generate tags.
  2. To use PLC limits for all meters, set the INI parameter [Workspace.Meter]UseDefaultPLCLimits=TRUE.
  3. To use PLC limits for only some meters, add an equipment runtime parameter in Citect Studio PLCLimits=* (asterisk).
    If UseDefaultPLCLimits=FALSE, the equipment with a runtime parameter will use PLC limits, and all other equipment will use standard analog limits.
    If UseDefaultPLCLimits=TRUE, the equipment with a runtime parameter will use standard analog limits and all other equipment will use PLC limits.
  4. To use item names that are different from the ones listed in step 1 above, set the INI parameter [Workspace.Meter]PLCLimitNames to a comma-separated list of item names in the order LL, L, H, HH.

See Also

Add Equipment Using Equipment Editor
Manually Define Equipment Runtime Parameters

Published June 2018