Operation Using a Programmable Logic Controller (PLC)
INPUT
INPUT
INPUT REGISTER
REGISTER
REGISTER 08:
08:
08: Gun
Gun
Gun 1
1
1 Trigger
Trigger
Trigger
INPUT
INPUT
INPUT REGISTER
REGISTER
REGISTER 18:
18:
18: Gun
Gun
Gun 2
2
2 Trigger
Trigger
Trigger
The Gun Trigger register is used to signal the ProMix
PD2K when the automatic spray device is triggered.
This signal should be sent any time the spray device
is triggered. The state of this register provides timing
for alarm functions and also drives the flow control
algorithm.
NOTE:
NOTE:
NOTE: If enabled, it is imperative that this signal be
sent any time the spray device is triggered. Without it
the flow control features will not work.
• Write a value of ‘1’ to signal that the gun is
triggered.
• Write a value of ‘0’ to signal that the gun is NOT
triggered.
NOTE:
NOTE:
NOTE: This register is used only if the Gun Trigger
is set to ‘Network’ via System Screen 4 on the ADM.
If it is set to ‘Discrete’ this register is ignored and
gun trigger is handled via the discrete input. See
NOTE:
NOTE:
NOTE: Because timing is so critical for flow control
Graco recommends that users provide a discrete
input to minimize latency effects.
Input Register 08
Gun Trigge r
Discrete Signal
1
0
1
0
ProMix PD2K:
Mix Unit #1
Gun Trigge r S ta te
Figure 13
Gun 1 Trigger Timing (Network and
Discrete Signals Shown
INPUT
INPUT
INPUT REGISTER
REGISTER
REGISTER 09
09
09 and
and
and 19:
19:
19: Fluid
Fluid
Fluid Control
Control
Control
Mode
Mode
Mode
The Fluid Control Mode register is used to
toggle system control between Flow Control
and Pressure Control (see Fluid Control on
).
• A value of ‘0’ sets the Mix Unit to Flow Control.
• A value of ‘1’ sets the Mix Unit to Pressure Control.
NOTE:
NOTE:
NOTE: This setting is available remotely for flexibility,
but typical applications will not change it.
INPUT
INPUT
INPUT REGISTERS
REGISTERS
REGISTERS 20
20
20 ––
– 29:
29:
29: DCS
DCS
DCS
Command
Command
Command Structure
Structure
Structure
See
Dynamic Command Description, page 50
.
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