Configuration Tab 1756-OA8E
Use this configuration tab to configure a 1756-OA8E diagnostic module.
Additionally, use this tab to:
- Select a value to determine the behavior of each output when the controller transitions to Program mode
- Select a value to determine the behavior of each output when the controller transitions to Fault mode
- Verify that the actual state of an output is the same as the commanded state, when the commanded state was ON
- Detect the absence of field wiring or a missing load
- Enable diagnostic latching
- Select what to do with outputs in case of a communications failure in Program modeTIP:The module configuration information is stored in the controller and the controller configures the module.
Parameters
Program Mode
Select one of these for each output point:
- Off - output will be 0 or OFF in Program mode
- On - output will be 1 or ON in Program mode
- Hold - output will maintain last state in Program mode
Use this function to determine the behavior of each output when the controller transitions to Program mode. While in Program mode, outputs from the controller are ignored and the output behaves according to one of the above.
Fault Mode
Select one of these for each output point:
- Off - output will be 0 or OFF in Communications Fault mode
- On - output will be 1 or ON in Communications Fault mode
- Hold - output will maintain current level in Communications Fault mode if communications fail while in the Program Mode state.
Use this function to determine what happens to the output of each point after a communication fault occurs and the module enters Communications Fault mode.
Communication Failure
Select one of these if communications fail:
- Leave outputs in Program mode state
- Change outputs to Fault mode state
Field Power Loss
Select the box for each output point you want to sense if the field power to the digital output module is lost.
TIP:
This field appears for diagnostic AC output modules only.
Enable Diag. Latching
Select the box for each output point you want to enable diagnostic latching; do not select the box for each output point you want to disable diagnostic latching. If enabled, the diagnostic members remain set once they are triggered, even after the error condition is gone. This allows you to detect intermittent diagnostics.
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