Design Outline Of Counter Function - Mitsubishi MELSEC-Q Series User Manual

1
PRODUCT OUTLINE
1.2.3
The following describes the outline of the count operation, using the counter function of the
QD72P3C3.
Programmable
controller CPU
GX Configurator-PT
1) Pulses input to the QD72P3C3 are counted.
Counting pulses can be performed separately from positioning control.
Counting feedback pulses enables positioning control, checking the actual
position at the same time.
The positioning address and count value can be synchronized with the use of
following functions.
Count value selection function at OPR
Current feed value, count value
simultaneous change function
2) The status of I/O signals and buffer memory of the QD72P3C3 can be checked with
the sequence program.
The start/stop and preset of count operation can also be performed.
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- 8 1.2 Outline of Positioning Control and Count Operation

1.2.3 Design outline of counter function

Design outline of counter function
Positioning module
Read/write, etc.
Initial setting/
Auto refresh setting
Buffer memory/
I/O signals
QD72P3C3
Forward run pulses
Reverse run pulses
Feedback pulses
Pulses
Pulses
Refer to
Section 8.4.
Refer to
Section 12.7.
Drive unit Servomotor
M
PLG
Pulse generator/
encoder
Pulse generator/
encoder