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Operation Using
a Programmable Logic Controller (PLC)
Operation Usi
ng a Programmable Logic Controller
(PLC)
Network Communications and
Discrete 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
System Screen 5, page 71). The following features
can be set to ‘Discrete’ or ‘Network’:
• Flow Cont
rol – Means of adjusting the control set
point (s
ee Flow Control Set Point below).
• Gun Trig
ger – Means of signaling the ProMix PD2K
when the
spray device is triggered.
NOTE: Th
e Manual Override check box enables a
user to
operate the system before the automation
(PLC) i
s 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
Overri
de be disabled during normal operation to
avoid
driving the system in a way that conflicts with
the au
tomation sequence.
Discrete I/O
The ProMix PD
2K does not supply power for
Discrete I/
O. A clear understanding of these inputs
is necessar
y to properly integrate the ProMix PD2K
with the PLC
or networking device. Input and output
connection
s are made at the Discrete I/O terminal
strips on t
he Enhanced Fluid Control Module (EFCM)
inside the
control box.
Table 3 and Figure 2 show where discrete I/O
connections are made on the ProMix PD2K.
Table 3 PD2K Discrete I/O Connections
I/O
Description
EFCM
Connector
Pins Type
Gun Trigger
Input
61,2
Normally Open
Contact
Contro
lSet
Point
7
1,2 4-20 mA Input
Safety
Interlock
Input
7
11,12
Normally Open
Contact
2
4
332564B