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10. PLC Help Function
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10.4 Key Operation by User PLC
The same operation as if the operator performed key operation can be performed by operating key
data by user PLC.
10.4.1 Key Data Flow
R16
R112
User PLC
(b)
(c)
(a)
(d)
For monitor
Valid key data processing
(CNC)
(a) Key data is set in file registers R16 and R112 at the top of the user PLC main.
(b) The user PLC refers to the key data and performs necessary processing.
(c) The user PLC sets the key data matching the operation board being used in R112.
(d) After user PLC main processing is performed, controller performs valid key data processing
according to the R16 and R112 contents.
10.4.2 Key Operations That Can Be Performed
(1) When a key is pressed, it is ignored.
· The R16 contents are judged and NULL (00H) code is set in R112.
(2) When R16 is NULL, that is, key operation is not performed, user PLC performs key operation
conforming to the operator.
· Key data matching the target operation is set in R112.