ASDA-A2 Chapter 12 Absolute System
12-18 Revision February, 2017
12.3.4 Use Digital Inputs/Outputs to Initialize an Absolute System
Except PR mode, the digital inputs and outputs can be used for a driver to do homing when other
modes are selected. Move the motor to home place, enable digital input, ABSE, then enable digital
input, ABSC from OFF to ON, and the system will start to initialization. The pulse number will be
set to zero and the number in P6-01 is for PUU to reference. Please refer to Figure 12.3 below for
the signal controlling chart.
Figure 12.3 The controlling chart for initializing an absolute system via digital inputs/outputs
The descriptions for the timing:
1. When the host controller switches ABSE from OFF to ON, a period of time Ts have to be waited
for the next step to process.
2. After waiting time Ts, the host controller now can enable the ABSC from OFF to ON and hold
the signal for T
Q
to reset the coordinate system where pulse number will be zero and PUU number
is defined in P6-01.
12.3.5 Use Parameters to Initialize an Absolute System
When the parameter P2-71 is set to 1(one) via digital keypad or communication, the system starts
to initialization. In order to protect from accidentally writing on P2-71 to reset an absolute system,
the number 271 should be written to P2-08 to unlock the writing of 1(one) to P2-71. The procedure
is P2-08=271 and then P2-71=1. This mode is only for the other modes except PR mode that
already has its homing procedure to apply.
T
S(ms)
T
Q(ms)
Min. P2-09+2
Max. P2-09+10
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