Yaskawa Sigma-5 Large Capacity Users Manual: Design and Maintenance-Rotary Motors-Analog Voltage and Pulse Train Reference - Manual (Page 125)

5 Operation
5.2.1 Servo ON Signal
5-4
5.2 Basic Functions Settings
5.2.1 Servo ON Signal
This sets the servo ON signal (/S-ON) that determines whether the servomotor power is ON or OFF.
(1) Signal Setting
Note: Use parameter Pn50A.1 to allocate the /S-ON signal to another terminal. For details, refer to 3.4.1 Input Signal Allo-
cations for details.
(2) Settings for Continuous Servo ON Signal
Parameter Pn50A.1 can be used to enable the Servo ON condition constantly.
5.2.2 Servomotor Rotation Direction
The servomotor rotation direction can be reversed with parameter Pn000.0 without changing the polarity of
the speed/position reference. This causes the rotation direction of the servomotor to change, but the polarity of
the signal, such as encoder output pulses, output from the SERVOPACK does not change. (refer to 5.3.6
Encoder Output Pulses)
The standard setting for forward rotation is counterclockwise (CCW) as viewed from the load end of the ser-
vomotor.
Type Name
Connector
Pin Number
Setting Meaning
Input /S-ON
CN1-40
[Factory setting]
ON
Servomotor power is ON. Servomotor
can be operated.
OFF
Servomotor power is OFF. Servomo-
tor cannot be operated.
Always input the servo ON signal before inputting the speed/position/torque reference to
start or stop the servomotor. Do not input the references first and then use the servo ON
signal or turn ON/OFF the AC power supply to start or stop. Doing so will degrade inter-
nal elements and lead to accident. Input the servo ON signal while the servomotor stops.
While the servomotor is rotating, the servo ON signal cannot be input.
Parameter Meaning
When
Enabled
Classification
Pn50A
n. 0
[Factory setting]
Inputs the servo ON signal from the input terminal
CN1-40.
After restart Setup
n. 7 Constantly enables the servo ON signal.
Operation of the SERVOPACK and converter will be possible (i.e., power will be sup-
plied) when the main circuit power supply is turned ON if the servo ON signal is set to be
always enabled. When inputting speed/position/torque reference, be sure to implement
safety measures for unexpected operation of the servomotor and machine.
Operation of the SERVOPACK and converter will be possible (i.e., power will be sup-
plied) when an alarm is reset after an alarm occurs. The servomotor or machine may
operate unexpectedly if an alarm is reset while a reference is being input.