Configure PDO instructions

Use the
Advanced
 tab of the
PDO Properties dialog box
 to configure the Process Discrete Output (PDO) instructions to:
  • Configure the instruction for processing feedback from the connected device.
    • Configure the instruction function when the device is treated as virtual.
      • Set the temporal characteristics of On, Off, and Pulse commands.
        • Specify the follow up action when the I/O fault is reported and when the device does not reach the target state in specified time.
          • Specify how to deal with interlocks and permissives that can be bypassed when the instruction is in override.
To configure values for the PDO instruction
  1. On the instruction in the routine, perform one of these actions:
    • On the Ladder or FBD instruction, select .
    • In the Structured Text editor, right-click the tag name and select
      Configure <tag name>
      .
  2. Open the
    Advanced
    tab.
  3. Set the parameters:
    • Device provides
      .
      • On feedback
        . Select the check box to inform the instruction that the connected device provides the On feedback status signal, the signal is wired and can be processed in the instruction.
      • Off feedback
        . Select the check box to inform the instruction that the connected device provides the Off feedback status signal, the signal is wired and can be processed in the instruction.
    • Device uses
      .
      • On feedback
        . Select the check the box to inform the instruction that the On feedback from the device should be used to verify that the device reached its target state when the output is on. If the command source is Hand and the instruction is in Physical, the On feedback is tracked for bumpless transfer from Hand to another command source.
      • Off feedback
        . Select the check box to inform the instruction that the Off feedback from the device should be used to verify that the device reached its target state when the output is off. If the command source is Hand and the instruction is in Physical, the Off feedback is tracked for bumpless transfer from Hand to another command source.
    • Fault when both feedback inputs are.
      • On.
         Use the option to indicate the conflict in device status reporting via feedback. The instruction reports a fault when both feedback inputs are On. Feedback is invalid and the device is commanded Off when in Hand.
      • Off
        . Use the option to indicate the conflict in device status reporting via feedback. The instruction reports a fault when both feedback inputs are Off. Feedback is invalid and the device is commanded Off when in Hand.
    • De-energize output on.
      • I/O fault.
        Use the check box to configure the instruction to de-energize the output (shed the device) on I/O fault.
      • Position fail
        . Use the check box to configure the instruction to de-energize the output (shed the device) when the device fails reaching the target state in due time.
    • In override mode, bypass bypassable interlocks and permissives
      . Use the check box to automatically bypass bypassable permissives and bypassable interlocks in Override.
    • Enable pulsing functions
      . Use the check box to enable pulsing functions.
      • Finish pulse when commanded Off or On
        . Use the check box to finish pulse in progress when commanded On or Off. When this check box is cleared, the pulse terminates immediately when commanded On or Off.
    • Operator command resets fault
      . Use the checkbox to allow operator commands to reset any previous faults, then move the device.
    • External command resets fault
      . Use the checkbox to allow external commands to reset any previous faults, then move the device.
    • Audible on
      :
      • Device energize only
        . Select to indicate the audible will be sounded on a device energize only.
      • Any commanded state change
        . Select to indicate the audible will be sounded on any commanded state change.
  4. View the read-only parameters:
    • Device state
      . When the
      Logix Designer
       application is online with the controller, the indicator displays the current device state, such as Off, Pulse on, or Out of service.
    • Device issues.
       When the
      Logix Designer
       application is online with the controller, the indicator displays fault conditions, such as Feedback fault or I/O fault.
  5. Select
    Apply
    .
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