Mitsubishi FX3U-422-BD - Outline of Communication Setting in the FX Series

A-54
FX Series PLC User's Manual - Data Communication Edition
Common Items
3 Outline of Communication Setting in the FX Series
3.1 Setting Method
3. Outline of Communication Setting in the FX Series
This chapter describes which communication parameters can be changed for each communication type and
provides methods on how to change them.
3.1 Setting Method
The following two communication setting methods are available for FX PLCs. Either method can be used, but
the method using parameters is recommended.
1. Setting methods
1) Specify the settings using parameters in the sequence programming software
Register the settings in parameters, transfer it to the PLC and turn the PLC's power OFF and then ON.
(This method is not available in FX
2(FX), FX2C, and FX0N PLCs.)
(This method is not available for ch0 in FX
3G PLCs.)
2) Directly specify the settings in a sequence program
Prepare a sequence program which sets the communication format, station number and time-out time
setting, and then transfer the program to the PLC.
Caution
Regardless of the method chosen above, a PLC operates the same way. If both methods are selected,
priority is given to the method using parameters.
2. Communication setting method availability in each FX PLC
* Only ch1 and ch2 are available.
3. Setting flow
FX Series FX2(FX),FX2C FX0N FX1S FX1N,FX1NC FX2N,FX2NC FX3G FX3U,FX3UC
Parameter method — —   * 
Program method  
Sequence
program for
set values
Parameter area
Program area
Parameter
method
Program
method
[MOV H D8120]
[MOV K D8121]
[MOV K D8129]
[MOV H D8400]
[MOV K D8409]
[MOV H D8420]
[MOV K D8421]
[MOV K D8429]
[MOV H D8370]
[MOV K D8379]
In FX 3G, FX 3U and FX 3UC
D8120
D8121
D8129
D8400
D8409
D8420
D8421
D8429
Communication format
Station number settings
Time-out time setting
Time-out time setting
Communication format
Communication format
Station number settings
Time-out time setting
Transferred
when power
is turned ON
Written by
program
ch1Computer link
Ch0 is available only
in the FX
3G PLC.
The setting method
using parameter cannot
be used for ch0.
RS instruction
Inverter communication
Program communication
ch1RS2 instruction
D8370
D8379 Time-out time setting
Communication format
ch0RS2 instruction
ch2Computer link
RS instruction
Inverter communication
Program communication
Written by
program
Written by
program
Written by
program
PLC memory
When both methods are selected at the same time, priority is given to
the contents set using the parameter method.
Setting window
In FX 3G, FX 3U and FX 3UC