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5.4.6 Speed Feedback
A PLG (Pulse Generator) or a resolver can be selected for speed feedback (for details of the interface, see
section 3). Speed control with a TG is not provided because its performance is inferior.
5.4.6.1 PLG
A signal is detected from a 2-phase PLG attached to the motor and converted to a speed.
Detection is basically performed according to the pulse number measurement system. This system converts a
signal to a speed based on the fact that the pulse number inputted in a period (1ms) is proportional to the speed.
Since in this system, pulse signals from the PLG do not change at an extremely low speed or 0 speed, stable
speed detection is not possible. When it is necessary to operate the equipment for such a purpose (passing 0
speed in reversible operation has no problem), use a resolver.
$CS_RES_TYPE = 1
$CS_RES_PGFLT (factory setting)
$CS_PGOUT = 0
$CS_PGCNT = 256 (PG pulse count)
Count 25000/100%
Pulse signal
Speed detection
detection
Pulse count measurement
Rotation direction detection
Speed detection
PGB-F
Section 3.3.1
PGA-F
Section 3.3.1
SP_F
θ
0
Fig. 5.4.3 PLG Speed Detection
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