Checking The Absence/Presence Of Errors - Mitsubishi Electric FX3U-232-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (RS/RS2 Instruction)
11.4.1 Checking communication port settings (in FX
1. Checking the operation mode
In FX , FX , FX
3S 3G
D8389 stores the communication type code currently adopted in communication port ch0.
D8419 stores the communication type code currently adopted in communication port ch1.
D8439 stores the communication type code currently adopted in communication port ch2.
The table below shows the contents of the communication type codes.
Code
0
1
2
3
4
5
6
7
8
9
10
11
12
If the operation mode is different, check the parameters and sequence programs.
11.5

Checking the Absence/Presence of Errors

1. Checking for communication errors
When a communication error occurs, the serial communication error flag turns ON.
When the communication port ch0 is used in FX
In all PLCs except FX
For FX , FX
3G 3GC
When communication port ch2 is used in FX
When the serial communication error flag turns ON, D8062, D8063 or D8438 stores the corresponding error code.
Available channels vary depending on the main unit.
2. Checking the error code
When the serial communication error flag turns ON, a corresponding error code shown below is stored in
D8063 or D8438.
ch0 (D8062) ch1 (D8063)
6201
6202
6203
6204
6205
6206
—
—
—
—
—
—
—
—
—
When an error code above is stored, check the following items:
• Wiring
• Parameter settings
, FX and FX PLCs, the communication port operation status can be checked.
3GC 3U 3UC
Programming communication
PP modem mode
Protocol dedicated to computer link
N:N Network
RS instruction
RS2 instruction
Parallel link
Inverter instruction
The variable analog potentiometer expansion board is used.
MODBUS communication
CF-ADP
ENET-ADP
Input/output expansion board is used.
, FX , FX and FX
3G 3GC 3U
, FX and FX PLCs using the communication port ch1, M8063 turns ON.
3U 3UC
Error code
ch2 (D8438)
6301 3801
6302 3802
6303 3803
6304 3804
6305 3805
6306 3806
6307 3807
6308 3808
6309 3809
6312 3812
6313 3813
6314 3814
6320 3820
6330 3830
6340 3840
, FX , FX
3S 3G
Description
, FX PLCs, M8062 turns ON.
3G 3GC
PLCs using the communication port, M8063 turns ON.
3UC
, FX , FX and FX
3G 3GC 3U 3UC
Contents of error
Parity error, overrun error or framing error
Defective communication character
Communication data sum mismatch
Defective data format
Defective command
Monitoring timeout
Modem initialization error
N:N Network parameter error
N:N Network setting error
Parallel link parameter error
Parallel link sum error
Parallel link format error
Inverter communication error
Memory access error
Special adapter connection error
11 Troubleshooting
11.5 Checking the Absence/Presence of Errors
, FX and FX
3GC 3U 3UC
PLCs, M8438 turns ON.
For details, refer to Section 3.2.
A
PLCs)
B
C
D
E
F
G
H
I
Apx.A
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