Available Internal Data
22
3A1704N
PLC Outputs to CGM Inputs for PLC Control Descriptions
Byte
Bit
Data
Type
State or
Range
PLC Outputs to CGM Inputs for PLC Control Description
0
0
Bit
Square Wave Heart Beat: CGM initiates a square wave that toggles every 3 sec. The PLC
must follow the heartbeat. If the heart beat is lost from the PLC or CGM then the system will
shutdown if the CGM/PLC is controlling the HFR. If the PLC does not detect the heartbeat
then the PLC should cycle the PLC output bit HI/LO in attempt to establish the heartbeat
from the CGM.
0
Heartbeat pulse off
1
Heartbeat pulse on
1
Dispense Status: Monitor Only: On Circulation systems, this indicates that a dispense is
pending or in progress (or when pre-dispense timer is active and during a dispense).On an
L-head system Dispense Valve is considered open until the end of the clean out cycle. On
other types of systems the bit will indicate a dispense is active.
0
Dispense not active
1
Dispense active
2
Dispense Valve Position: Used for diagnostics only. Not to be used to control a dispensed
shot.
0
Dispense valve closed
1
Dispense valve open
3
Not Used
0
N/A
1
N/A
4
Pump Parked: Parking the pump involves moving the Red pump to the position which the
pump shaft is least exposed to the atmosphere. System must be in Standby mode.
Chemical will dispense out of the dispense valve if it is not a circulating system.
0
Not parked
1
Parked
5
DV Lockout/Circulation Control: Used to lock out the dispense valve or configure circulation
mode (if circulation valves are installed) when in standby, operator, shot or sequence
modes only. If the PLC is controlling the dispense valve directly (P2/ Fusion DV option),
operator mode only is available.
0
Unlocked
1
Locked out
6
Mix Head Cleanout: Used for L-Head systems cleanout /diagnostics only.
0
Cleanout is open
1
Mis head cleanout closed
7
System Startup Bit: Bit will initiate a controlled startup of the system. The temperature
conditioning zones will be initiated when the bit is high. Low pressure recirculation is also
enabled when the bit is set (Standby and night modes). Turning off this bit will turn OFF the
temperature conditioning zones and circulation. For stall to pressure systems with a manual
dispense valve, setting this bit will configure the pumps to stall to the pressure set point. For
stall to pressure systems with a manual dispense valve, setting this bit will configure the
pumps to stall to the pressure set point.
0
System startup is on
1
System startup is off
