YASKAWA SGD7S Product Manual page 251

6.9 Internal Set Speed Control
6.9.4 Changing Internal Set Speeds with Input Signals
An operating example of speed control with the internal set speeds is given below. This exam-
ple combines speed control with the internal set speeds with the soft start function. The shock
that results from speed changes is reduced by using the soft start function.
Motor speed
+SPEED3
+SPEED2
+SPEED1
-SPEED1
-SPEED2
-SPEED3
/SPD-A signal
/SPD-B signal
/SPD-D signal
6-56
Speed 3
Speed 2
Speed 1
Stopped
0
OFF ON ON
OFF
ON ON OFF
OFF
OFF OFF OFF
The acceleration/deceleration rates
are set in Pn305 and Pn306.
Stopped
Speed 1
Speed 2
Speed 3
OFF OFF ON ON
OFF ON ON OFF
OFF ON ON ON
Stopped
OFF
OFF
ON