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ASDA-A3
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Absolute System
10.3.4 Establishing the absolute origin position
When the absolute position is lost, the servo drive provides three methods to establish the
absolute origin position: DI/DO, parameter setting, or the PR homing function. The following
provides more details for each method.
10.3.4.1 Establishing the absolute origin position with DI/DO
When the servo system is controlled by the controller, establish the absolute origin position with
DI/DO. Once the absolute position is established, the pulse number is reset to 0 and the PUU
number is reset to the value of P6.001. Refer to the following diagram for detailed descriptions.
Description:
1. When the controller triggers DI.ABSE, it has to wait for TS before proceeding to the next
step.
2. After reaching TS, the controller starts to establish the absolute origin position.
When DI.ABSC is triggered and remains on for TQ, the pulse number is reset to 0 and the
PUU number is reset to the value of P6.001.
10
On
DI.ABSE
Off
On
DI.ABSC
Off
Absolute
position counter
(Pulse = 0; PUU = P6.001)
TS
TQ
Figure 10.3.4.1.1 Timing diagram for establishing the absolute origin position with DI/DO
The following table describes the TS and TQ delay time after DI.ABSE and DI.ABSC are
switched to On.
TS (ms)
TQ (ms)
Min
P2.009 + 2
Max
P2.009 + 10
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