Mitsubishi Electric MELDAS C6 Programming Manual page 365

(a) Example of rotary body index by ROT K1 instruction
Conditions: (i) The number of rotary body index cycles is 6.
(ii) The target position is specified by a T command.
(Note) Normally the target position must be a binary, but in this example,
1
2
0
Index code 2
1
Index code 2
2
Index code 2
3
Index code 2
Index code
strobe
In the example of ladder circuit shown below, the rotation direction is determined by the T
command and current position data given by the machine, and the rotary body is rotated in
that direction until the target position reaches the current position. When indexing is
completed, the auxiliary command completion signal is turned on.
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10. Exclusive Commands 2
10.2 S.ROT Commands
the number of rotary body index cycles is 1 to 6, and there is no
difference between the binary and BCD. Thus, the direct T
command output file register R220 (BCD) is used.
6
5
Target position
4
3
Current position
PLC
X30
X31
PLC processing
X32
X33
X34
R220
CNC
T code data,
T command start
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M
CW
Y10
Y11 CCW
Y71E
Auxiliary function
completed (Fin)