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6.8 Absolute Encoders
6.8.4 Reading the Position Data from the Absolute Encoder
6-36
6.8.4
Reading the Position Data from the Absolute Encoder
The SENS_ON (Turn ON Sensor) command is used to read the position data from the absolute
encoder.
The sequence for using the SENS_ON command to read the position data from the absolute encoder
of a Rotary Servomotor is given below.
The multiturn data is sent according to the transmission specifications.
The position of the absolute encoder within one rotation is output as a pulse train.
*1.
When you turn OFF the control power supply, input the SENS_OFF command.
*2.
The pulse output time T for the position of the absolute encoder within one rotation depends on the setting of Pn212
(Number of Encoder Output Pulses). Refer to the following table.
Setting of Pn212
Calculation of the Pulse Output Speed
for the Position of the Absolute
Encoder within One Rotation
Calculation of the Pulse Output Time T
for the Position of the Absolute
Encoder within One Rotation
16 to 16,384
680
×
Pn212/16,384 [kpps]
25 ms max.
16,386 to 32,768
680
×
Pn212/32,768 [kpps]
50 ms max.
32,722 to 65,536
680
×
Pn212/65,536 [kpps]
100 ms max.
65,544 to 131,072
680
×
Pn212/131,072 [kpps]
200 ms max.
131,088 to 262,144
680
×
Pn212/262,144 [kpps]
400 ms max.
262,176 to 524,288
680
×
Pn212/524,288 [kpps]
800 ms max.
524,352 to 1,048,576
680
×
Pn212/1,048,576 [kpps]
1,600 ms max.
1,048,704 to 2,097,152
680
×
Pn212/2,097,152 [kpps]
3,200 ms max.
2,097,408 to 4,194,304
680
×
Pn212/4194304 [kpps]
6,400 ms max.
Power
s
upplied.
Main circuit
power
s
upply
Control power
s
upply
*1
/
S
-RDY
s
ignal
ALM
s
ignal
S
V_ON command
S
EN
S
_ON
command
*1
PAO
s
ignal
PBO
s
ignal
Motor power
s
tatu
s
Multiturn
data
Incremental pul
s
e
s
Incremental pul
s
e
s
ON
OFF
OFF
ON
No alarm
ON
OFF
ON
OFF
Power not
s
upplied.
ON
OFF
Undefined.
Undefined.
5
s
max.
50 m
s
Approx. 15 m
s
1 m
s
to
3
m
s
T
*2
90 m
s
typ.
Po
s
ition within one rotation
(incremental pul
s
e
s
)
Po
s
ition within one rotation
(incremental pul
s
e
s
)