7. APPLICATION INSTRUCTIONS
7 − 118
MELSEC-A
7.9.4 Annunciator reset instruction
(LEDR)
In the case of the CPU modules which have an LED indicator on its front side,
pressing the "INDICATOR RESET" switch executes the processing same as that
called by the LEDR instruction.
Available Device
Bit device Word (16-bit) device Constant Pointer
Level
Carry
flag
Error
flag
X Y M L S B F T C D W R A0 A1 Z V K H P I N
Digit specification
Number of steps
M9012 (M9010, M9011)
Functions Reses of the CPU annunciator display and the self-diagnosis error display.
• When there is a self-diagnosis error though the CPU can continue the operation.
Reset the "ERROR" LED or error display on the front of the CPU when the
self-diagnosis error is displayed.
The contents in M9008 and D9008 are not reset, so they should be reset by using
the user’s program.
At this time, the annunciator is not reset.
• When the annunciator is ON
CPU modules which do not have an LED indicator on the front panel
Performs the following actions:
(1) Flickers and then turns off the "ERROR" LED.
(2) Resets the annunciator (F) stored in D9009.
(3) Resets D9009 and 9125 and shifts the F numbers of D9126 to 9131 to be
processed.
(4) Transfers the F number, which has been newly stored in D9125, to D9009.
(5) Reduces -1 from the data of D9124. However, when D9124 is 0, the data
remains 0.
Applicable
CPU
All CPUs
Reset instruction
LEDR
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