Mitsubishi FX3U-232-BD User Manual

B-43
FX Series PLC User's Manual - Data Communication Edition
N:N Network
9 Troubleshooting
9.5 Checking Setting Contents and Errors
A
Common Items
B
N:N Network
C
Parallel Link
D
Computer Link
E
Inverter Communication
F
Non-Protocol Communication (RS/RS2 Instruction)
G
Non-Protocol Communication (FX
2N
-232IF)
H
Programming Communication
I
Remote Maintenance
Apx.
Discontinued models
2. Communication setting using parameters
Verify that the communication settings using parameters are suitable for use. Do not set parameters for the
N:N Network. If the communication settings are not suitable for use, communication will not function correctly.
After changing a setting, make sure to reboot the PLC’s power.
→ For the communication setting, refer to Chapter 5.
3. Presence of VRRD and VRSC instructions (except FX3U and FX3UC PLCs)
Verify that the VRRD and VRSC instructions are not used in the program.
If these instructions are used, delete them, reboot the PLC’s power.
4. Presence of RS instruction (except FX3U and FX3UC PLCs)
Verify that the RS instruction is not used in the program.
If this instruction is used, delete it, reboot the PLC’s power.
5. Presence of RS and RS2 instructions (in FX3U and FX3UC PLCs)
Verify that the RS and RS2 instructions are not being used for the same channel.
If these instructions are used for the same channel, delete them, reboot the PLC’s power.
6. Presence of EXTR instruction (in FX2N and FX2NC PLCs)
Verify that the EXTR instruction is not used in the program.
If this instruction is used, delete it, then reboot the PLC’s power.
7. Presence of IVCK, IVDR, IVRD, IVWR, and IVBWR instructions (in FX3U and FX3UC PLCs)
Verify that the IVCK, IVDR, IVRD, IVWR and IVBWR instructions are not being used for the same channel.
If these instructions are used for the same channel, delete them, reboot the PLC’s power.
9.5 Checking Setting Contents and Errors
1. Checking the setting contents
Verify that the N:N Network is set correctly.
Each FX PLC has devices for checking the setting. Verify that the correct contents are stored in the devices
shown in the table below.
If the correct contents are not stored in the devices above, check the sequence program.
2. Checking setting errors (only in FX3U and FX3UC PLCs)
1) Error flags
If the parameter setting includes an error, the serial communication error flag turns ON.
Verify that the devices shown in the table below are ON.
When using the N:N Network on ch 1, check M8063.
When using the N:N Network on ch 2, check M8438.
Device Name Description
D8173 Station number settings status Provided to check the station number.
D8174 Slave station quantity setting status Provided to check the number of slave stations.
D8175 Refresh range setting status Provided to check the refresh range.
Device Name Description
M8063 Serial communication error 1 (ch 1)
Turns ON when abnormality occurs during serial communication
using ch 1.
M8438 Serial communication error 2 (ch 2)
Turns ON when abnormality occurs during serial communication
using ch 2.

Mitsubishi FX3U-232-BD Specifications

General

Brand	Mitsubishi
Model	FX3U-232-BD
Category	Controller
Language	English