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Control Linked to a Host Device Section 3-3
3-3 Control Linked to a Host Device
3-3-1 Application
In this example configuration, a CJ1-series PLC controls a reflow oven and an
EJ1 performs temperature control on 6 zones and 12 control loops in the
oven.
• If an EJ1@-HFU is used, a ladder program does not have to be created to
exchange data such as temperature readings and alarm status with the
PLC.
Also, up to 15 Basic Units can be connected to a single HFU to expand
the system to a maximum of 60 channels.
M
3G3RV
Inverter
CJ1-series PLC
EJ1
HFU TC4 TC4 EDU
CJ1W-CIF11
RS-422A Converter
G3NA
Solid State Relays
Sensor
inputs
Control outputs
RS-485
RS-232C
RS-422A/485
RS-232C
NS8
Programmable Terminal
RUN
TC4
Processing in
N
2 atmosphere
Workpiece
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