Methods For Turning Off The Leds - Mitsubishi 00JCPU User Manual

6.21.1Methods for turning off the LEDs

(1) Methods
(a) Basic model QCPU
To turn off the ERR.LED, remove the error cause and then operate the special relay SM50 and special register
SD50 to clear the error (except for reset operation).
(b) High Performance model QCPU, Process CPU, and Redundant CPU
The LEDs can be turned off by the following operations (except for reset operation.)
Execute the LEDR instruction after resolving the error.
After resolving the error, clear the error by the special relay SM50 and special
*1
register SD50
Turn off the LED by the special relay SM202 and special register SD202.
*1: Description of special relays and special registers
• SM50
• SD50
• SM202 : Turns off the LED corresponding to each bit of SD202 when the CPU module is powered off and then on.
• SD202 : Set an LED to be turned off.
Configure setting to turn off each LED as follows:
• Turning off both the Boot LED and USER LED : SD202 = 110
• Turning off only the BOOT LED
• Turning off only the USER LED
(2) Methods for not turning on the ERR. LED, USER LED, and BAT. LED
There is a priority in indications of the ERR.LED, USER LED, and BAT.LED. (
When an cause number of an LED is deleted in the priority, the LED will not turn on even if an error with the cause
number occurs.
Table6.33 Methods for turing off the LEDs
Method for turning off the LED
(operation continuation error only).
: Clears an error of the error code stored in SD50 when the CPU module is powered off and then on.
: Stores an code of an error to be cleared.
For details of error codes, refer to the following.
QCPU User's Manual (Hardware Design/Maintenance and Inspection)
b15
SD20
Figure 6.84 Bit structure of the special register SD202
*1
b8
1/0
BOOT LED
H
: SD202 = 100
H
: SD202 = 10
H
CHAPTER6 FUNCTIONS
Applicable LED
ERR. USER BAT. BOOT
: Valid,
b4 b0
1/0
USER LED
0: Not turn on.
1: Turns on.
Section 6.21.2)
6 - 121
1
2
3
4
5
6
: Invalid
7
8