Mitsubishi Electric QJ71MB91 User Manual page 321

11
TROUBLESHOOTING
Status signal
No.
name
Status of access with programmable
*2
0
C/N
controller CPU
*2
1 Parity error or sum check error status Error occurred
P/S
*2
2 Communication protocol error status Request message analysis error
PRO.
*2
3 SIO error status
SIO
CH common or CH1 side error
*2
C/1 ERR.
occurred
4
*2
CH2 side error occurred
CH2 ERR.
5
6 (Unused)
7
8 ACK. Normal completion
9 NAK Error completion
A NEU. Neutral status
B
C
(Unused)
D
E
F n E-RES. Presence of error response
Table11.6 Display data of H/W information
Description
(*1)
Framing error or overrun error
occurred
Intelligent function module switch
setting error, parameter error, etc.
Master : Communication processing
Slave : Request message
Master : Communication processing
Slave : Request message
Master : Communication not
Slave
Error response occurred
* 1 This status signal turns on if data write is requested to the programmable controller CPU while
online change is disabled in the intelligent function module switch setting (
GX Developer. It also turns on when an error occurs in access between the QJ71MB91 and the
programmable controller CPU.
* 2 This status signal does not automatically turn off even if the cause of the error is removed.
To turn this off, perform the processing for turning off the LED after removing the error cause.
( Section 11.5)
Lit
When it is ON (1)
Normal
Normal
Normal
Normal
Normal
Master : Communication not
normally completed
Slave : Request message not
processing normally
completed
Master : Communication not
completed in error
processing completed in Slave : Request message not
error
Master : Communication in processing
processed Slave : Request message in
: Wait for request message
Normal
11.2 Checking QJ71MB91 Status
Unlit
When it is OFF (0)
processed/Communication
processing completed in error
processed/Request
message processing
completed in error
processed/Communication
processing normally
completed
processed/Request
message normally completed
processing
Section 6.6) of
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