User's Manual

Available Internal Data
3A1704G 9
Available Internal Data
The following internal data with this system can be viewed and modified by your fieldbus master.
NOTE: Refer to appropriate system manual for machine operation instructions.
Units
In
Byte
CGM Input
from PLC
Output
Out
Byte
CGM Output
to PLC Input Descriptions
System
Status
(Bit Number | Name)
0 | Heartbeat 1-2 Needs to fol-
low the CGM
Output.
1-2 Square wave
toggles every
3 sec.
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
PLC does not detect the heartbeat
then the PLC should cycle the PLC
output bit HI/LO in attempt to estab-
lish the heartbeat from the CGM. If
no heartbeat is detected then a dis-
connected cable or major error may
exist in the CGM.
1 | Status of Dispense 1= Dispense
A c t i v e ,
0 = Dispense
not active
Monitor Only: On Circulation sys-
tems, this indicates that a dispense
is pending or in progress (or when
pre dispense timer is active and dur-
ing a dispense).On an L-head sys-
tem 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.
2 | Dispense Valve
(1 = Open)
0 = Close Dis-
p e n s e V a l v e
1 = Open Dis-
pense Valve
0 = Dispense
V a l v e C l o s e d ,
1 = Dispense
Valve Open
Used in diagnostics only. Not to be
used to control a dispensed shot.
3 | Ratio Check Valve
(1 = Enabled)
0 = Enable Dis-
pense Valve
1 = Enable
Ratio Check
Valve
0 = Dispense
Valve is
enabled
1 = Ratio
Check Valve
is enabled
Valid for VRM/VPM, Infusion/Paste
systems only. Initiating a Dispense
cycle will dispense material out of
the Ratio Check valves when in
Ratio Check mode. When bit is OFF
the material will dispense normally
thru the Dispense valve.
4 | Pump Parked
(1 = Parked)
1= Begin Park 0 = Pump is
not Parked, 1
= Pump is
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 dis-
pense out of the dispense valve.