Graco ProMix PD2K Operation page 38

Operation Using a Programmable Logic Controller (PLC)
INPUT REGISTER REGISTER 08:
INPUT INPUT REGISTER
INPUT REGISTER REGISTER 18:
INPUT INPUT REGISTER
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
Digital Inputs, page 24.
NOTE: Because timing is so critical for flow control
NOTE: NOTE:
Graco recommends that users provide a discrete
input to minimize latency effects.
Input Register 08 1
Gun Trigge r
Discrete Signal
ProMix PD2K:
Mix Unit #1
Gun Trigge r S ta te
Figure 13 Gun 1 Trigger Timing (Network and
Discrete Signals Shown
38
08: Gun Gun 1 1 1 Trigger Trigger
08: Gun Trigger
18: Gun Gun 2 2 2 Trigger Trigger
18: Gun Trigger
0 1
INPUT REGISTER
INPUT INPUT
Mode
Mode Mode
The Fluid Control Mode register is used to
toggle system control between Flow Control
and Pressure Control (see Fluid Control on
System Screen 4, page
• A value of '0' sets the Mix Unit to Flow Control.
• A value of '1' sets the Mix Unit to Pressure Control.
NOTE: This setting is available remotely for flexibility,
NOTE: NOTE:
but typical applications will not change it.
INPUT REGISTERS
INPUT INPUT
Command Structure Command Command
See Dynamic Command Description, page
0
REGISTER 09 09 and and 19:
REGISTER 09 and
71).
REGISTERS 20 20 – – – 29:
REGISTERS 20
Structure Structure
19: Fluid Fluid Control Control
19: Fluid Control
29: DCS DCS
29: DCS
50.
3A4486D