Instruction Completion And Error Flag Operation - Mitsubishi FX3U-USB-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
Inverter Communication
9.3.3

Instruction completion and error flag operation

When two or more inverter communication instructions are programmed, the following flags turn ON or OFF
according to the execution result of each inverter communication instruction.
To acquire the result of each inverter communication instruction, make sure to provide these flags just below
each inverter communication instruction.
Device
number
ch1 ch2
M8029 Instruction execution complete
M8063 M8438 Serial communication error
M8152 M8157 Inverter communication error
Inverter communication error
M8153 M8158
lach
M8154 M8159 IVBWR instruction error
*1. The IVBWR instruction is supported only in FX
1. Operation of M8029 (instruction execution complete flag)
The operation of M8029 (instruction execution complete flag) represents the state in which the IVDR
instruction is completed while M0, M2 are off and M1 is ON.
(OFF)
M0
(ON)
M1
M2
(OFF)
2. Processing of communication errors
The following two types of processing are executed for communication errors.
The parity error/overrun error/framing error flags (shown in the upper column) turns ON when an error occurs
in any type of communication.
The error flag shown in the lower column turns ON when an error occurs during communication with an
inverter.
ch1 ch2
M8063 M8438 M8152 M8157 M8153
ON
ON
When inverter communication error flag turns ON, the step number is stored in the inverter communication
error occurrence step device (D8153 or D8158).
Create the program shown below for each corresponding instruction to check the inverter communication
error code (stored in D8152 or D8157).
Description
*1
[1] IVWR instruction is not driven
FNC273
IVWR
[2] IVDR instruction is driven
FNC271
IVDR
[3] IVCK instruction is not driven
FNC270
IVCK
Bit device
ch1 ch2 ch1 ch2
M8159 D8063 D8438
OFF OFF
ON
ON
(only at first time)
9 Creating Programs (for FX3G, FX3U and FX3UC PLCs)
9.3 Common Items in Inverter Communication Instructions
Device
number
ch1 ch2
D8063 D8438 Serial communication error code
D8152 D8157 Inverter communication error code
D8153 D8158 Step in which inverter communication error occurred
D8154 D8159 IVBWR error parameter number
and FX PLCs.
3U 3UC
Operation of
instruction execution
complete flag
M8029 : OFF
M8029 : ON
M8029 : OFF
Word device
ch1 ch2
6301 3801 Parity error, overrun error or framing error
Any inverter communication error other than
6320 3820
those above
Description
*1
Description
E-87
A
B
C
D
E
F
G
H
I
Apx.