
4.DESCRIPTION OF PARAMETERS B-64120EN/01
- 112 -
Least command
increment
X CMR
Error counter
X DMR
Reference
counter
DA
Converter
Position detector
To velocity
control
Feedback pulse
Detection
unit
+
-
Fig.4.18 (a) CMR, DMR, and the Capacity of the Reference Counter
Set the magnification ratios of CMR and DMR so that the weight
of positive inputs to the error counter equals that of negative inputs.
Least command increment Feedback pulse unit
CMR
= Detection unit =
DMR
The feedback pulse unit varies according to the type of detector.
The amount of travel per rotation of
the Pulsecoder
Feedback pulse unit =
The number of pulses per rotation of
the Pulsecoder (2000, 2500, or 3000)
As the size of the reference counter, specify the grid interval for the
reference position return in the grid method.
Grid interval
Size of the reference counter =
Detection unit
Grid interval = The amount of travel per rotation of the Pulsecoder
The value set in the parameter is obtained as follows:
(1) When command multiplier is 1/2 to 1/27
1
Set value =
(Command multiplier)
+100
Valid data range: 102 to 127
(2) When command multiply is 1 to 48
Set value = 2 × command multiplier
Valid data range: 2 to 96
NOTE
When command multiplier is 1 to 48, the set value
must be determined so that an integer can be set
for command multiplier.