Mitsubishi QJ71MB91 User Manual

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11.2 Checking QJ71MB91 Status
11
TROUBLESHOOTING
* 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 ( Section 6.6) of
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)
Table11.6 Display data of H/W information
No.
Status signal
name
Description
Lit
When it is ON (1)
Unlit
When it is OFF (0)
0
C/N
*2
Status of access with programmable
controller CPU
(*1) Normal
1
P/S
*2
Parity error or sum check error status Error occurred Normal
2
PRO.
*2
Communication protocol error status Request message analysis error Normal
3
SIO
*2
SIO error status
Framing error or overrun error
occurred
Normal
4
C/1 ERR.
*2
CH common or CH1 side error
occurred
Intelligent function module switch
setting error, parameter error, etc.
Normal
CH2 ERR.
*2
CH2 side error occurred
5
(Unused)
6
7
8 ACK. Normal completion
Master : Communication processing
normally completed
Slave : Request message
processing normally
completed
Master : Communication not
processed/Communication
processing completed in error
Slave : Request message not
processed/Request
message processing
completed in error
9NAK Error completion
Master : Communication processing
completed in error
Slave : Request message
processing completed in
error
Master : Communication not
processed/Communication
processing normally
completed
Slave : Request message not
processed/Request
message normally completed
A NEU. Neutral status
Master : Communication not
processed
Slave : Wait for request message
Master : Communication in processing
Slave : Request message in
processing
B
(Unused)
C
D
E
F n E-RES. Presence of error response Error response occurred Normal

Mitsubishi QJ71MB91 Specifications

General

Brand	Mitsubishi
Model	QJ71MB91
Category	Controller
Language	English