LS Mecapion L7 A001, User Manual

Page: 53 / 222

3. Wiring Method
3-15
3.7 Transmission of Absolute Encoder Data
3.7.1 Transmission of Absolute Encoder Data
Upon the absolute encoder's request for absolute data, the data of the absolute encoder are
transmitted to the upper level controller in the form of quadrature pulses through the output
of the encoder output signals, AO and BO.
In this case, pulses are output at the speed of 500 [Kpps].
Among absolute data, multi-turn data are transmitted first, followed by single-turn data.
(Refer to “4.1.6 External Input Signal and Logic Definition" for information on the allocation of
the sequence input signal and ABS-RQ signal.)

Transmission Sequence of Absolute Data
1. When the servo is off, change the ABS_RQ signal on the upper level controller to ON.
2. The servo drive checks the ABS_RQ signal for 10 [ms].
3. The servo drive prepares the transmission of multi-turn data for 100 [ms].
4. The servo drive transmits multi-turn data for up to 140 [ms] (based on 16-bit multi-turn data).
5. The servo drive prepares the transmission of single-turn data for 100 [ms].
6. The servo drive transmits single-turn data with the pre-scaler ratio applied for up to 1100 [ms]
(based on 19-bit single-turn data).
7. The servo drive operates with normal encoder output signals 100 [ms] after the single-turn data are
completely transmitted.
Absolute data transmission
Pre-scaler pulse output