Led Indication; Methods For Turning Off The Leds - Mitsubishi Electric Q01UCPU User Manual

3.20

LED Indication

Operating status of the CPU module can be checked by the LEDs on the front of the CPU module.
For details of LED indications, refer to the following.
QCPU User's Manual (Hardware Design, Maintenance and Inspection)
3.20.1

Methods for turning off the LEDs

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 register
*1
SD50 (operation continuation error only).
Turn off the LED by the special relay SM202 and special register SD202.
*1 Description of special relays and special registers
• SM50 : Clears an error of the error code stored in SD50 when the CPU module is powered off and then on.
: Stores a code of a error to be cleared.
• SD50
For details of error codes, refer to the following.
• 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: SD202 = 100
• Turning off only the USER LED: SD202 = 10
There is a priority in indications of the ERR.LED, USER LED, and BAT.LED.
When a 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. (
Method for turning off the LED
QCPU User's Manual (Hardware Design, Maintenance and Inspection)
b15
SD20
Page 220, Section 3.20.2)
*1
b8
1/0
BOOT LED
H
H
H
CHAPTER 3 FUNCTIONS
: Enabled, × : Disabled
Relevant LED
ERR. USER BAT. BOOT
× ×
b4 b0
1/0
USER LED
0: Not turn on.
1: Turns on.
219
3
×
×