Yaskawa Σ-V Series AC Servo Drives Rotational Motor Analog Voltage Reference - Manual (Page 140)

5 Operation
5.9.2 Absolute Data Request Signal (/SEN)
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5.9.2 Absolute Data Request Signal (/SEN)
The absolute data request signal (/SEN) must be input to obtain absolute data as an output from the SERVO-
PACK.
The following table describes the SEN signal.
Note: The SEN signal must be allocated. It can be allocated to a terminal with Pn515.0. For details, refer to 3.3.1 Input
Signal Allocations
The SEN signal is input at the following timing.
∗ Turn OFF the SEN signal to turn OFF the control power supply.
For the details of the absolute data reception sequence, refer to 5.9.5 Absolute Data Reception Sequence .
Type Signal Name
Connector
Pin Number
Setting Meaning
Input /SEN Must be allocated
ON (closed)
The host controller sends a request to
the SERVOPACK for the absolute data.
OFF (open) Disabled
• Maintain ON (closed) for at least 1.3 seconds when the SEN signal is turned OFF and
then ON, as shown in the figure below.
• SEN Signal cannot be OFF while the servomotor power is ON.
SERVOPACK control
power supply
5 seconds max.
ON
OFF
OFF
ON (Normal status)
OFF ON
Rotational serial data
(Phase A)
(Phase B) (Phase B)
Approx. 560 ms max.
The servomotor will not be turned ON even if /S-ON is turned ON during this interval.
ALM signal OFF
(Alarm status)
SEN signal
PAO
PBO
Servomotor power
Undefined
Undefined
(Phase A)
OFF
OFF
OFF
OFF
*
ON
Incremental
pulses
Incremental
pulses Initial incremental
pulses
Initial incremental
pulses
Ana-
log
OFF ON (closed)
1.3 s min.
OFF ON
15 ms min.
SEN signal