Panasonic FP-E Programming Manual page 67

Clearing buffer areas and initial data
Of the areas in which relay numbers are stored, only DT90400 and DT90401 can be
cleared by directly specifying the special data register with the RST instruction.
If DT90400 is specified, all error information in the buffer is cleared, and if DT90401 is
specified, the initial relay number in the buffer area is cleared. Buffers fill up as shown
in the example below.
Example: When the contents of DT90401 are deleted using the RST
instruction
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X1
DF R DT90401
Storage buffer 1
Storage buffer 2
Storage buffer 3
Storage buffer 4
Storage buffer 17
Storage buffer 18
Storage buffer 19
Storage buffer 20
Storage buffer 21
Storage buffer 499
Storage buffer 500
Storage buffer 1
Storage buffer 2
Storage buffer 3
Storage buffer 4
Storage buffer 17
Storage buffer 18
Storage buffer 19
Storage buffer 20
Storage buffer 21
Storage buffer 499
Storage buffer 500
1.2
K 1 DT90401
K 2 DT90402
K 3 DT90403
K 4 DT90404
K17 DT90417
K18 DT90418
K19 DT90419
K20
K21
K499
K500
K 2 DT90401
K 3 DT90402
K 4 DT90403
K 5 DT90404
K18 DT90417
K19 DT90418
K20 DT90419
K21
K22
K500
Explanation of Relays
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