Operations Of Special Devices For Error Detection; Error Detection Timing - Mitsubishi FX3G Series Programming Manual

FX /FX /FX /FX
3G 3U 3GC 3UC
Programming Manual - Basic & Applied Instruction Edition
38.3.2

Operations of special devices for error detection

Special auxiliary relays for error detection and special data registers for error detection operate in the relationship
shown below.
The state of error occurrence can be checked by monitoring the contents of auxiliary relays and data registers or by
using the PLC diagnosis function programming tool.
By using the PLC diagnosis function provided in the programming tool (GX Developer), Graphic
Operation Terminal (GOT1000) or the display module (FX
(D8060 to D8067, D8438, D8449) can be checked in message format.
D8009 M8009 24V DC down
D8060 M8060 I/O configuration error
D8061 M8061 PLC hardware error
M8069
I/O
D8062 M8062 Serial communication error 0
bus check
D8063 M8063 Serial communication error 1
D8438 M8438 Serial communication error 2
D8064 M8064 Parameter error
D8065 M8065 Syntax error
D8066 M8066 Circuit error
D8067 M8067 Operation error
After clearing errors, forcibly clear M8068 using the device monitor function in a programming tool.
M8316
M8318
D8449 M8449
D8489 M8489
38.3.3

Error detection timing

Error item
M8060 I/O configuration error
M8061 PLC hardware error
M8062 Serial communication error 0 [ch 0]
M8063 Serial communication error 1 [ch 1]
M8438 Serial communication error 2 [ch 2]
M8064 Parameter error
M8065 Syntax error
M8066 Circuit error
M8067 Operation error
M8068 Operation error latch
M8109 I/O refresh error
M8316 Unconnected I/O designation error
M8318 BFM initialization failure
M8449 Special block error
M8489 Special parameter error
D8166 Special block error condition
876
Series
M8068 Operation error latch
Unconnected I/O
designation error
BFM initialization failure
Special block error
Special parameter error
ERROR (ERR)
LED status
Unlit
Lit
Unlit
Unlit
Unlit
Flickering
Flickering
Flickering
Unlit
Unlit
Unlit
Unlit
Unlit
Unlit
Unlit
Unlit
38 Error Check Method and Error Code List
38.3 Supplementary Explanation of Devices for Error Detection
3U
D8004
Special M number
(smallest device
number) of error
occurrence
D8315 D8314
D8313 D8312
D8317 D8316
D8318
D8319
PLC
When power is When PLC mode
status
turned from
OFF to ON
RUN Check
STOP Check
⎯
RUN
⎯
RUN
⎯
RUN
STOP
STOP
Check
STOP
RUN
⎯
RUN
⎯
RUN
⎯
RUN
⎯
RUN
⎯
RUN
STOP Check
⎯
RUN
-7DM), the contents of the error code
M8004
ON when an error
occurs
32K Error step number
The error step number is also stored in
D8069, but only for programs 32K
steps and less.
1st error step latched
The error step number is also stored in
D8068, but only for programs 32K
steps and less.
Error step number
Error unit number
Error BFM number
Error detection timing
switches from Other timing
STOP to RUN
Check
⎯
Always
When receiving signal
⎯
from counterpart station
When receiving signal
⎯
from counterpart station
When receiving signal
⎯
from counterpart station
When program is changed
(STOP)
Check
When program is
transferred (STOP)
⎯
RUN mode
⎯
Always
⎯
RUN mode
Check
⎯
Always
When special parameter is
⎯
changed (STOP)
⎯
Always
⎯
⎯