16.18.3 Automatic operation mode 2 (shortest rotating indexer)
This operation mode automatically changes a rotation direction to the shortest distance to execute
positioning to a station.
The positioning is executed by selecting a station No. using 8-bit devices of the DI0 (Next station No.
selection 1) to DI7 (Next station No. selection 8). For the servo motor speed and acceleration/deceleration
time constant during operation, the values set in the point tables are used.
(1) Device/parameter
Set input devices and parameters as follows.
Control mode selection of [Pr. PA01]
Select "_ _ _ 8" (positioning mode (indexer
method)).
DI0 (Next station No. selection 1) to
DI7 (Next station No. selection 8)
Set any next station No. (Refer to (3) of this
section.)
Automatic operation mode 2
(shortest rotating indexer)
selection
MD0 (Operation mode selection 1)
MD1 (Operation mode selection 2)
SIG (External limit/Rotation direction
decision/Automatic speed selection)
The servo motor speed will be as follows.
Off: setting value of [Pr. PC05 Automatic operation
speed 1]
On: setting value of [Pr. PC06 Automatic operation
speed 2]
Acceleration time
constant/Deceleration time
constant
RT (Second acceleration/deceleration
selection)
1. When RT is turned off
Acceleration time constant: setting value of [Pr.
PC01 Acceleration time constant 1]
Deceleration time constant: setting value of [Pr.
PC02 Deceleration time constant 1]
2. When RT is turned on
Acceleration time constant: setting value of [Pr.
PC30 Acceleration time constant 2]
Deceleration time constant: setting value of [Pr.
PC31 Deceleration time constant 2]
(2) The other parameter setting (number of stations)
Set a number of stations to [Pr. PT28]. The setting is the same as that of automatic operation mode 1.
Refer to section 6.2.2 (2) (b).
[Pr. PA14 Rotation direction selection] is not used in the automatic operation mode 2.
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