438
LEDR
(b) For CPUs with an LED display at the front
The following operations will be conducted when the LEDR instruction is executed:
1) The F number being displayed at the front of the CPU module will be reset.
2) "USER" LED flickers, and is turned off.
3) The annunciators (F) stored in SD62 and SD64 are reset, and the F numbers for SD65 to SD79 are compressed
forwards.
4) The data newly stored at SD64 is transmitted to SD62.
5) The data at SD63 is decremented by -1. However, if SD63 is 0, it remains 0.
6) The F number being stored at SD62 is displayed at the LED display. However, if the value of SD63 is 0, nothing
will be displayed.
Decrements 1.
Before execution
200
1
200
0
0
0
0
0
SD62
SD63
SD64
SD65
SD66
SD67
SD78
SD79
After execution
0
0
0
0
0
0
0
0
SD62
SD63
SD64
SD65
SD66
SD77
SD78
SD79
Number of registered F numbers
F number is not displayed on the
LED display unit since SD63 is 0.
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