·248·
Installation manual
CNC 8060
CNC 8065
4.
PLC PROGRAMMING.
(REF: 1402)
Consulting instructions.
4.2.2 Flank detection instructions.
They check whether the state of a resource has changed since the last time this consultation
was made. This consultation may be made on real or image values. The instructions available
are:
DFU
Detect an up flank.
It detects an up-flank (0-to-1 change) at the indicated resource. It returns a "1" if it happened.
DFD
Detect a down flank.
It detects an down-flank (0-to-1 change) at the indicated resource. It returns a "1" if it
happened.
The programming format for DFU and DFD is:
DFU Detect an up flank.
DFD Detect a down flank.
DFU
DFD
I1··1024
O1··1024
M1··8192
MSG1··1024
ERR1··1024
B0··31 R1··1024
CLK
CNC-PLC communication marks
DFU I23
DFU B3R120
DFU AUXEND
DFD O32
DFD M45
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