Initializing Error Information Of The Serial Communication Module - Mitsubishi Electric QJ71C24N User Manual

11 TROUBLESHOOTING

11.1.2 Initializing error information of the serial communication module

Cause of error
Switch setting error
Mode switching error
On-demand execution error
Data transmission error
Data reception error
MC protocol transmission error
Monitoring device error
Pre-defined protocol function
error
I/O signal
XE
Input signal
XF
YE
Output signal
YF
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This section explains the ERR. LED ON factors and the error code initialization (clear)
for the Q series C24.
(1) ERR. LED ON factors
When any of the following errors occurs, its error code is stored in the buffer
memory corresponding to the interface (CH) where the error occurred, and the
ERR. LED turns on.
Error code storage buffer memory
Address
CH1 CH2
Switch setting error and mode switching
203
H
error status
256 266 On-demand execution result
H H
257 267 Data transmission result
H H
258 268 Data reception result
H H
25A 26A MC protocol transmission error code
H H
Programmable controller CPU monitoring
2205 2305
H H
function execution result
4042 4052 Pre-defined protocol function error code
H H
(2) Turning off the ERR. LED and initializing the error codes by GX
Configurator-SC (Refer to Section 9.6.11)
(a) When turning off the ERR. LED and initializing the error codes
By making the CH
ERR. LED of the Q series C24 turns off and the stored error codes are
initialized.
(b) When initializing the communication error information
By making the CH
"Monitor/test others" screen, the LEDs (ERR., NEU.) of the Q series C24
turn off and the communication error information is initialized.
(3) Turning off the ERR. LED and initializing the error codes by
sequence program
(a) Input signals used to notify of error occurrences and output signals used to
initialize the error code
Item
CH1 ERR. occurrence
CH2 ERR. occurrence
CH1 ERR. clear request
CH2 ERR. clear request
Initialization of error code is continuously performed when ERR. clear request
(YE/YF) is on.
POINT
The CHn side error information can be initialized by the LED off, Communication
error clear request (address: 0
error codes stored in the above buffer memory can further be initialized (cleared).
However, protocol execution logs are not cleared even if the ERR. clear request
(YE/YF) is used.
Name
ERR. clear request on the "Monitor/Test" screen, the
LED off, Communication error clear request on the
Description/function
Turns on upon error occurrence in CH1 interface.
Turns on upon error occurrence in CH2 interface.
Turns on when initializing error code of interface on CH1 side.
Turns on when initializing error code of interface on CH2 side.
/1 ). By using the ERR. clear request (YE/YF), the
H H
MELSEC-Q
Applicable protocol
Non- Bidirectional
MC
procedure protocol
Pre-
defined
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