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4 DATA USED FOR POSITIONING CONTROL
Programmable controller
Programmable
controller
CPU
[X(n+1)8 to X(n+1)F]
Positioning start signal
Start complete signal
BUSY signal
Positioning complete signal
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Pr. 6 Bias speed at start
Set the minimum starting speed for OPR control, positioning control and JOG
operation. When using a stepping motor or like, set this speed to start the motor
smoothly. (A stepping motor does not start smoothly if the motor speed is low at
a start.)
Set a value not more than " Pr. 5 Speed limit value". If it is more than " Pr. 5
Speed limit value", the "Setting range outside bias speed" error (error code: 906)
will occur.
Pr. 7 Positioning complete signal output time
Set the output time of the positioning complete signal [X(n+1)8 to X(n+1)F] output
from the QD70D.
Positioning complete indicates that the preset dwell time has elapsed after the
QD70D ended pulse output.
If the setting value is 0 (ms) or if the axis stop signal was used to make a stop
during JOG operation or speed control of speed-position switching control, the
positioning complete signal is not output.
QD70D
Positioning
start signal
[Yn8 to YnF]
Positioning
complete signal
Fig. 4.2 Positioning complete signal output time
Pr. 8 Deviation counter clear signal output time
Set the duration of the deviation counter clear signal output during a machine
OPR control operation using any of the following methods: the near-point dog
method, stopper 1 to 3, and count 1. (For details, refer to your drive unit manual.)
M
Positioning control
Output time
MELSEC-Q
Positioning complete signal
(after elapse of dwell time)
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