Appendix A - I/O Signal Descriptions
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Appendix A - I/O Signal Descriptions
This section provides details about the CGM Automation Input and Output Signals.
Automation Inputs (signals from EFR system to PLC)
Heartbeat to PLC
Heartbeat to PLC is a Boolean signal that toggles at a
frequency of 1 Hz. This signal toggles so the PLC can
confirm the EFR is connected.
NOTE:
The EFR is monitoring the fieldbus connection
as well. If the fieldbus connection stops transferring
data, the EFR will automatically shut down.
System On
System On is a Boolean signal that indicates the active
or inactive state of the machine. A value of 1 indicates
the machine is ON or active, and a value of 0 indicates
the machine is OFF or inactive.
NOTE:
The system must be ON or active for the
machine to dispense.
System Ready
System Ready State is a Boolean signal that indicates
when the machine is ready to receive the next
command.
NOTE:
the system will not be ready to receive the next
command if the EFR is dispensing, loading a sequence,
or if an active alarm is present.
Alarms Present
Alarms Present is a Boolean signal that indicates the
alarms present on the EFR.
NOTE:
When an alarm is present, the EFR requires the
operator’s attention and will shut down immediately.
Deviations Present
Deviations Present is a Boolean signal that indicates the
deviations present on the EFR.
NOTE:
When a deviation is present, the EFR is warning
the operator of potential problem(s) that may need
immediate attention to avoid shutdown time.
Advisories Present
Advisories Present is a Boolean signal that indicates the
advisories present on the EFR.
NOTE:
When an advisory is present, the EFR is warning
the operator of potential problem(s) that may need
attention in the future to avoid shutdown time.
Current Sequence is Playing
Current Sequence is Playing is a Boolean signal that
indicates when the sequence is dispensing/running.
Current Sequence is Paused
Current Sequence is Paused is a Boolean signal that
indicates when the sequence is paused.
Current Sequence is Stopped
Current Sequence is Stopped is a Boolean signal that
indicates when the sequence is stopped.
Dispense Valve Open
Dispense Valve Open is a Boolean signal that indicates
when the valve is open.
System is Priming
System is Priming is a Boolean signal that indicates
when the system is priming.
System is Purging
System is Purging is a Boolean signal that indicates
when the system is purging.
System is Parking
System is Parking is a Boolean signal that indicates
when the system is parking.
System is Depressurizing
System is Depressurizing is a Boolean signal that
indicates when the system is depressurizing.
