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Operation Using a Programmable Logic Controller (PLC)
Operation
Operation
Operation Using
Using
Using a
a
a Programmable
Programmable
Programmable Logic
Logic
Logic Controller
Controller
Controller (PLC)
(PLC)
(PLC)
Network
Network
Network Communications
Communications
Communications and
and
and
Discrete
Discrete
Discrete I/O
I/O
I/O
The ProMix PD2K Automatic system does not use
a Booth Control module. Instead, it uses Network
Communications and has optional Discrete I/O
features to drive the system remotely.
Some automation control elements of the
ProMix PD2K can be driven by a discrete
input
or
network communications. These
options need to be configured at the ADM (see
). The following features
can be set to ‘Discrete’ or ‘Network’:
• Flow
Flow
Flow Control
Control
Control – Means of adjusting the control set
point (see Flow
Flow
Flow Control
Control
Control Set
Set
Set Point
Point
Point below).
• Gun
Gun
Gun Trigger
Trigger
Trigger – Means of signaling the ProMix PD2K
when the spray device is triggered.
NOTE:
NOTE:
NOTE: The Manual Override check box on System
Screen 1 enables a user to operate the system
before the automation (PLC) is available. Manual
Override can be used to run all functions of the
system if a proper gun trigger signal is provided. It is
not intended to be the main mode of control. Graco
recommends that Manual Override be disabled
during normal operation to avoid driving the system
in a way that conflicts with the automation sequence.
Discrete
Discrete
Discrete I/O
I/O
I/O
The ProMix PD2K does not supply power for
Discrete I/O. A clear understanding of these inputs
is necessary to properly integrate the ProMix PD2K
with the PLC or networking device. Input and output
connections are made at the Discrete I/O terminal
strips on the Enhanced Fluid Control Module (EFCM)
inside the control box.
Table 3 and Figure 12 show where discrete I/O
connections are made on the ProMix PD2K.
Table
Table
Table 3
3
3 PD2K
PD2K
PD2K Discrete
Discrete
Discrete I/O
I/O
I/O Connections
Connections
Connections
I/O
Description
EFCM
Connector
Pins
Type
Gun Trigger
#1 Input
6
1,2
Normally Open
Contact
Gun Trigger
#2 Input
6
3.4
Normally Open
Contact
Control Set
Point #1
7
1,2
4-20 mA Input
Control Set
Point #2
7
3.4
4-20 mA Input
Safety
Interlock
Input
5
10,11
Normally Open
Contact
3A4486D
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