Delta ASDA-A3 Series User Manual page 482

ASDA-A3 Motion Control
Pulse by-pass function
When using the E-Cam and pulse by-pass functions, the servo drive can receive pulse signals
and send these signals to the next servo axis, so multiple slave axes can refer to the same
master axis signals. In addition, signals transmitted through the servo drives are not attenuated
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because the servo drive amplifies the signals to the strength they should have during output.
For example, if the signal input is 4.5V, it becomes 5V when being output. Since there is
electrical resistance in the wire, take the signal attenuation into account and use twisted-pair
shielded wires. If the signals transmitted to the servo drive are attenuated to the level that the
servo cannot identify, use a cable with thicker gauge or a shorter signal cable. If not considering
the signal delay caused by cables, the delay time of each servo drive is 50 ns.
On the ASDA-A3 servo drives, the pulse output pins are OA, /OA, OB, and /OB of CN1 only;
pulses can be input through CN1 or CN5 to the servo drive. Use P1.074.Y to set the output
signal source for the servo drive. If selecting CN5 as the pulse input channel, as shown in
Figure 7.3.1.2, then you must set P1.074.Y to 1 for each slave axis (servo drive) to have CN5
receive pulses. If selecting CN1 as the pulse input channel, as shown in Figure 7.3.1.3, then
you must set P1.074.Y to 2 for each slave axis (servo drive) to have CN1 receive pulses.
(1) Master axis; (2) Slave axes 1, 2, and 3.
Figure 7.3.1.2 Pulse by-pass function: CN1 output / CN5 input
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