CSDP Plus Servo Drive User Manual

For the controller that can’t receive the serial data output through PS
terminal, the absolute encoder data is transmitted to the controller in
the form of incremental pulses through the output of the EA and EB
terminals, which are the incremental encoder output signals in the
early stage. Among the absolute value data, 1 revolution data is
transmitted after the multi-revolution data.
The serial data of the absolute value can be received through the EA
and EB terminals in the following order.
1. Keep /ABS-DT signal at low level, 10 ms or more.
2. Clear the UP/DOWN counter that counts the incremental pulses to 0 so that
it can be ready for the absolute encoder data reception.
3. Receive the multi-revolution data transmitted from the drive after 100 ms.
4. The EA and EB of the drive starts working with ordinary incremental
encoder output signals 50 ms after they transmitted 1 revolution data.
Encoder Signal
Signal Status Pulse
During initialization when the power is ON Early Incremental Pulse
EA
During ordinary operation after initialization Incremental Pulse
During initialization when the power is ON Early Incremental Pulse
EB
During ordinary operation after initialization Incremental Pulse
EC Always Origin Pulse
PS Always Serial Data of absolute encoder
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