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11.5 Turning Off the ERR. LED
11.5.2 Turning off the ERR. LED by sequence program
11
TROUBLESHOOTING
11.5.2 Turning off the ERR. LED by sequence program
This section explains how to turn off the ERR. LED from a sequence program.
(1) Procedure for turning off the ERR. LED
The following is the procedure for turning off the ERR. LED.
(a) I/O signals when the ERR.LED is lit
When an error occurs, the ERR. LED on the front of the QJ71MB91 module lights
up, and the CH common/CHn error (X1B/X1C) turns on. ((1) in the figure)
(b) Turning on the corresponding bit in the Detailed LED clear request storage area
Turn on all the relevant bits of the Detailed LED clear request storage area
(0008
H/0009H) in the buffer memory.
The above area is cleared when an error clear request described in (1)(c) of this
section is made after the clear request (turning on the corresponding bit).
When the above exception code storage area is turned on, the Exception code
storage error (address: 0002
H/0004H) in the buffer memory is cleared.
Figure 11.12 I/O signal behavior when the ERR. LED is lit
Figure 11.13 Configuration of the Detailed LED clear request storage area
Error
occurred
Error
occurred
Error
occurred
Error occurred
CH common/CHn error clear request
(Y1B/Y1C)
CH common/CHn error
(X1B/X1C)
(LED On)
ON1)
(LED Off)
2)
(LED On)
ON1)
3)
b0b1b2b3b4b5b6b7b8b9b10b11b12b13b14b15
1/0 1/0 1/0 1/0 1/0
b0b1b2b3b4b5b6b7b8b9b10b11b12b13b14b15
1/0 1/0 1/0 1/0 1/0
1/0
1/0
0: Not cleared
1: Clear request
0: Not cleared
1: Clear request
CH1 side Detailed LED clear request storage area (address: 0008H)
CH2 side Detailed LED clear request storage area (address: 0009
H)
Unused (Fixed to 0)
Unused (Fixed to 0)
CH1 error response code
storage area (0002
H)
CH2 error response code
storage area (0004
H)
CH1 C/N
CH1 P/S
CH1 PRO.
CH1 SIO
C/1 ERR.
CH2 C/N
CH2 P/S
CH2 PRO.
CH2 SIO
CH2 ERR.
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