YASKAWA SGD7S

6.5 Speed Control
6.5.6 Operation Examples for Changing the Motor Direction
6-28
Operation Example for Changing the Motor Direction and
Internal Set Speed Control
Even with a speed reference with the same polarity, you can change the motor direction and
stop the Servomotor by changing the control mode to internal set speed control and combining
the /SPD-D (Motor Direction Input) signal and /C-CEL (Control Selection Input) signal.
The following operation example combines internal set speed control, the /SPD-D signal, and
the /C-CEL signal. For this example, the internal set speeds must be set to 0.
 Parameter Settings
You must make the following parameter settings to combine internal set speed control, the
/SPD-D signal, and the /C-CEL signal.
• Set Pn000 = n.X (Control Method Selection) to 4 (Switching between internal set speed
control and speed control).
• Set Pn305 (Soft Start Acceleration Time) to the required acceleration time.
• Set Pn306 (Soft Start Deceleration Time) to the required deceleration time.
• Set Pn50A = n.X (Input Signal Allocation Mode) to 1 (Change the sequence input signal
allocations).
• Set Pn50C = n.X (/SPD-D (Motor Direction) Signal Allocation) to any setting other than
7 (the signal is always active) or 8 (the signal is always inactive).
• Set Pn50C = n.X (/SPD-A (Internal Set Speed Selection Input) Signal Allocation) to 8
(the signal is always inactive).
• Set Pn50C = n.X (/SPD-B (Internal Set Speed Selection Input) Signal Allocation) to 8
(the signal is always inactive).
• Set Pn50C = n.X (/C-SEL (Control Selection Input) Signal Allocation) to any setting
other than 7 (the signal is always active) or 8 (the signal is always inactive).
0
Speed reference
pattern
0
Analog speed
reference
(input reference
voltage)
/SPD-D signal
/C-SEL signal
OFF: CCW
ON: CW
OFF: Internal set speed control
OFFOFFOFFOFF ON
ON
ON
OFF
ON
ON
ON
OFF
ON: Speed control