6.9 Absolute Linear Encoders
6.9.4 Reading the Position Data from the Absolute Linear Encoder
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6.9.4
Reading the Position Data from the Absolute Linear
Encoder
The sequence to read the position data from the absolute linear encoder of a Linear Servomotor is
given below.
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.
6.9.5
Transmission Specifications
The position data transmission specifications for the PAO (Encoder Divided Pulse Output) sig-
nal are given in the following table.
The PAO signal sends only the 16-bit data (with sign).
Refer to the following section for the timing of sending the position data from the absolute
encoder.
Reading the Position Data from the Absolute Linear Encoder
Switched on
Controlword
(6040 hex)
Disable Operation
Statusword
(6041 hex)
Enable Operation
Power supplied.
Motor power status
Power not supplied.
Operation Enabled
Main circuit
power supply
Control power
supply
/S-RDY signal
ALM output signal
PAO signal
PBO signal
Upper 16-bit position
data (with sign)
Lower 20-bit position data
(incremental pulses)
Lower 20-bit position data
(incremental pulses)
Incremental pulses
Incremental pulses
ON
OFF
OFF
ON
No alarm
ON
OFF
Undefined.
Undefined.
5 s max.
50 ms
Approx. 15 ms
1 ms to 3 ms
400 ms max.
90 ms
typ.
Item
PAO signal
Synchronization Method
Start-stop synchronization (ASYNC)
Baud Rate
9,600 bps
Start Bits
1 bit
Stop Bits
1 bit
Parity
Even
Character Code
ASCII, 7 bits
Data Format
Refer to
.
Data Output Period
Only once after the control power supply is turned ON