User`s manual

273
APPENDICES
A
Appendix 1 Dedicated Instructions Appendix 1.1 G(P).PPCVRD
(2) Control data
(3) Function
• Reads the periodic pulse count value.
• When reading the periodic pulse count value using the PPCVRD instruction, consistency between the
periodic pulse count difference value and the periodic pulse count present value is retained.
• Completion device (D) and completion status indication device (D) +1 are available for the interlock signal of
the PPCVRD instruction.
(a) Completion device
Turns ON at END processing in the scan where the PPCVRD instruction is completed, and turns OFF at the
next END processing.
(b) Completion status indication device
Turns ON/OFF according to the status on completion of the PPCVRD instruction.
• Normal completion: Remains OFF.
• Error completion: Turns ON at END processing in the scan where the PPCVRD instruction is completed,
and turns OFF at the next END processing.
• The PPCVRD1 instruction and PPCVRD2 instruction can be performed simultaneously.
• The PPCVRD instruction can be performed while the module READY signal is ON. If performed while the
signal is OFF, the instruction is ignored.
Device Item Setting data Setting range Setting side
System area 
+1
Completion status
Stores the status on completion of the
instruction.
0: Normal completion
Other than 0: Error completion
 System
+2
Periodic pulse count difference value
Stores the periodic pulse count
difference value
-2147483648 to
2147483647
System
+3
+4
Periodic pulse count present value
Stores the periodic pulse count
present value
-2147483648 to
2147483647
System
+5
S
S
S
S
S
S
Sequence program
END
processing
END
processing
END
processing
END
processing
PPCVRD instruction
ON
OFF
ON
OFF
ON
OFF
Completion device (D)
Completion status
indication device (D) + 1
Error
completion
Normal
completion
1 scan
Completion of the
PPCVRD instruction