User`s manual

30
FX3U Series Programmable Controllers
User’s Manual - MODBUS Serial Communication Edition
5 Communication Setup
5.3 Simultaneous N:N Networking and MODBUS
5.3 Simultaneous N:N Networking and MODBUS Communication
When MODBUS communication and N:N Network are used simultaneously, N:N Networking must be setup
first (at program step 0). After which it is possible to program the MODBUS communication setup, as shown
below.
M8038
N:N Networking
Setup on Channnel 1
MOV
K0 D8176
MOV
K2 D8177
MOV
K0 D8178
MOV
K3 D8179
MOV
K5 D8180
0
Program for setting up N:N Networking
M8411
MODBUS Serial
Communication
Setup on Channel 2
MOV
H1097 D8420
MOV
H11 D8421
MOV
K10 D8431
MOV
H1 D8434
MOV
H11 D8435
26
Program for setting up a MODBUS Slave
The communication
format is set.
MOV
K100 D8436
b15 b0
0001 0000 1001 0111
1 0 9 7
8bit / Even / 1-bit / 19200bps / RS485
The protocol is set.
b15 b0
0000 0000 0001 0001
0 0 1 1
MODBUS Slave / RTU Mode
Slave Node Address: Slave Number 1
The Communication
Status Information
Setup is set.
b15 b0
0000 0000 0001 0001
0 0 1 1
Store Counter and Log to D Devices
Communication Status Device Range Setup:
Storage Head Device = D100
Message to Message Delay: 10ms
For more details on N:N Networking, refer to the
FX Series Programmable Controller User's
Manual - Data Communication Edition.