HRX-OM-W069
Chapter 3 Serial communication
HRL Series
3.1
Precautions wiring communication
3-1
Chapter 3 Serial communication
Serial communication (RS-485/RS232C) enables the remote control of
run/start of the product, temperature setting and details of product
condition, and alarm condition can be obtained.
The operating state of the product (run/stop) and the temperature
setting can be monitored by sending a request message made by the
program of the host computer (e.g. PC).
The communication protocol is MODBUS protocol.
3.1 Precautions wiring communication
○
Communication wiring
A communication cable that connects the product and customer
system is not included with the product. Please prepare a cable,
referring to 3.2
‘’Connected explanation’’ In order to avoid malfunction,
do not connect to any place other than those shown in 3.2
’’.
3.2 Connected explanation
Fig.3-1 shows the wiring when RS-485 is selected as the
communication standard. Fig3-2 shows the wiring when RS-232C is
selected.
A communication cable that connects the product and customer
system is not included with the product. Prepare a cable, referring to
Fig.3-1 or Fig 3-2.
Fig 3-1
RS-485 connector connection
2
SD+
5
SG
7
SD-
SD+
SD-
SG
Terminal
Master
This product
(first slave)
2
SD+
5
SG
7
SD-
This product
(second slave)
2
SD+
5
SG
7
SD-
This product
(31
slaves)
st
resistance
resistance
Terminal
Do not connect any wire to other PIN numbers.
