Appendix A - I/O Signal Descriptions
22
3A6338B
Automation Outputs (signals from PLC to EFR System)
System Enable Request
System Enable Request is a bit used to turn on/activate
the system. It has the same function as the
button. Set this bit to 1 to turn on/activate the system,
and set it to 0 to turn off/deactivate the system.
System Shutdown Request
System Shutdown Request is a bit used to immediately
shut down the system. It has the same function as the
button. Set this bit to 1 to immediately shut down
the EFR. Once the EFR has shut down, set this bit to 0
to clear the shutdown request.
Start Current Sequence/Step, Trigger
Operator Mode
Start Current Sequence/Step, Trigger Operator mode is
a bit used to play and trigger a sequence. Set this bit to
1 to start the sequence. Once the sequence is
dispensing, set this bit to 0 to clear the request.
NOTE:
When running in operator mode, this bit must
remain high (1) for operator mode to be triggered. Once
this bit is low (0), operator mode will be stopped and the
EFR will continue with the active sequence.
Pause Current Sequence
Pause Current Sequence is a bit used to pause the
active sequence. Set this bit to 1 to pause the current
active sequence. Once the sequence is paused, set this
bit to 0 to clear the request.
Stop Current Sequence
Stop Current Sequence is a bit used to stop the active
sequence. Set this bit to 1 to stop the current active
sequence. Once the sequence is stopped, set this bit to
0 to clear the request.
Priming Request
Priming Request is a bit used to turn the priming feature
ON and OFF. Set this bit to 1 to start the smart priming
feature. This bit can be set to 0 at any time during smart
priming to stop the smart priming feature.
NOTE:
Once the smart priming request is completed,
set this bit to 0.
Purging Request
Purging Request is a bit used to turn the purging feature
ON and OFF. Set this bit to 1 to turn the purging feature
ON. When the PLC is ready to stop purging, set this bit
to 0 to turn the purging feature OFF.
Parking Request
Parking Request is a bit used to turn the parking feature
ON and OFF. Set this bit to 1 to start the parking
feature. This bit can be set to 0 at any time while the
pump is parking to stop the parking feature.
NOTE:
Once the parking request is completed, set this
bit to 0.
Depressurizing Request
Depressurizing Request is a bit used to turn the
depressurizing feature on and off. Set this bit to 1 to turn
the depressurize feature ON. When the PLC is ready to
stop depressurizing, set this bit to 0 to turn the
depressurizing feature OFF.
Desired Active Sequence
Desired Active Sequence is a byte used to request a
new active sequence. If the value supplied is within the
operable range, the value will be accepted by the EFR
and reflected back to the Current Active Sequence of
the Automation Inputs. The operable range of this byte
corresponds to the number of sequences the EFR can
hold, which is 1 to 50.
Acknowledging the Active Error Number
See
Appendix D - Error Number Requiring
Acknowledgment
on page 32.
