YASKAWA SGD7S Product Manual page 286

Sequence for Reading the Position Data from the Absolute
Encoder without Using the SEN (Absolute Data Request) Signal
The sequence for reading the position data from the absolute linear encoder of a Linear Servomotor
without using the SEN signal is given below.
When the specified time has elapsed after the control power supply to the SERVOPACK is turned ON,
the SERVOPACK will automatically read the position data from the absolute linear encoder.
The upper 16-bit position data (with sign) are sent according to the transmission specifications.
The lower 20-bit data is output as a pulse train.
Control power
OFF
supply
Main circuit
power supply OFF
ALM signal
/S-RDY signal
OFF
/S-ON signal
OFF
Motor power status
Undefined.
PAO signal
Undefined.
PBO signal
Undefined.
PSO signal
5 s max. 50 ms
6.13.4 Reading the Position Data from the Absolute Linear Encoder
ON
ON
No alarm
Power not supplied.
Lower 20-bit position data
Upper 16-bit position
data (with sign) (incremental pulses)
Lower 20-bit position data
(incremental pulses)
90 ms
typ. Approx. 15 ms
400 ms max.
1 ms to 3 ms
6.13 Absolute Linear Encoders
ON
ON
Power supplied.
Incremental pulses
Incremental pulses
Signed 36-bit
position data
6
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