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47D Series Modbus Reference Guide EM-9501-C Rev.4
2.3 SYSTEM CONFIGURATION EXAMPLES
Network system configurations connecting the (slave) device to the (master) PC are as in the following examples:
CAUTION !
DO NOT attempt communication and setting at once for multiple devices. Transmissions may be mixed up and
unexpected setting changes may occur.
■
RS-485 / RS-232C
Set Modbus properties as in the table below:
Modbus address
Assign independent address to each device.
Baud rate
Identical setting for all devices connected via the RS-232C/RS-485 Converter.
Parity bit
Identical setting for all devices connected via the RS-232C/RS-485 Converter.
Stop bit
Identical setting for all devices connected via the RS-232C/RS-485 Converter.
RS-485 (Modbus RTU)
RS-232-C
RS-232-C/RS-485
Converter
(model: R2K-1 or LK1)
Lightning Surge Protector
for RS-485/422
(model: MD74R or MDP-4R)
*
1
Lightning Surge Protector
for RS-485/422
(model: MD74R
or MDP-4R)
*
1
*
1. Insert lightning surge protectors recommended in this example if necessary.
Digital Panel Meter
(model: 47Dx)
Max
Min
FZ
TZ
NG Zro Spn
TG
Hld
Tch
HH
H
P
L
LL
Max
Min
FZ
TZ
NG Zro Spn
TG
Hld
Tch
HH
H
P
L
LL
Max
Min
FZ
TZ
NG Zro Spn
TG
Hld
Tch
HH
H
P
L
LL
