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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
System
(Bit Number | Name)
Status
0 | Heartbeat
1 | Status of Dispense
2 | Dispense Valve
(1 = Open)
4 | Pump Parked
(1 = Parked)
System
5 | DV Lockout / Circu-
Status
lation Control
(1 = Locked out)
3A1704H
CGM Input
In
from PLC
Out
Byte
Output
Byte
1-2 Needs to fol-
1-2
low the CGM
Output.
0 = Close Dis-
pense Valve
1 = Open Dis-
pense Valve
1= Begin Park
1-2 0 = Unlock Dis-
1-2
pense Valve,
Non-Circula-
tion State
1 = Lockout
Dispense Valve
, Circulation
State
CGM Output
to PLC Input
Square wave
CGM initiates a square wave that
toggles every
toggles every 3 sec. The PLC must
3 sec.
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= Dispense
Monitor Only: On Circulation sys-
Active,
tems, this indicates that a dispense
is pending or in progress (or when
pre dispense timer is active and dur-
0 = Dispense
ing a dispense).On an L-head sys-
not active
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.
0 = Dispense
Used in diagnostics only. Not to be
Valve Closed,
used to control a dispensed shot.
1 = Dispense
Valve Open
0 = Pump is
Parking the pump involves moving
not Parked, 1
the Red pump to the position which
= Pump is
the pump shaft is least exposed to
Parked
the atmosphere. System must be in
Standby mode. Chemical will dis-
pense out of the dispense valve.
0 = Dispense
Used to lock out the dispense valve
Valve is
or configure to circulation mode (cir-
unlocked or in
culation type system) when in
Non-Circula-
standby/operator or operator/night
tion State
modes only. Only for stall to pres-
sure systems with an electric dis-
1 = Dispense
pense valve or any stall to pressure
Valve is
dispense valve configuration (circu-
locked out or
lation type system).
in Circulation
State
Available Internal Data
Descriptions
9
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