Mitsubishi Electric MR-JE-*C Instruction Manual page 292

12. WHEN USING WITH A GENERAL-PURPOSE INTERFACE
(b) Rotation direction
There are two operation methods: Rotation direction specifying indexer, which always rotates in a
fixed direction and executes positioning to a station; Shortest rotating indexer, which automatically
changes a rotation direction to the shortest distance and executes positioning to a station.
Rotation direction specifying indexer
(2) Automatic operation mode 1 (rotation direction specifying indexer)
In this operation mode, the servo motor rotates in a fixed direction 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.
(a) Device/parameter
Set input devices and parameters as follows:
Item
Selecting indexer method
Next station position
Selecting automatic operation
mode 1 (rotation direction
specifying indexer)
Rotation direction selection
Servo motor speed
Acceleration time constant/
Deceleration time constant
Torque limit (Note)
Note. The torque limit will change from [Pr. PC35 Internal torque limit 2] to the setting value of [Pr. PA11 Forward rotation torque limit] or
[Pr. PA12 Reverse rotation torque limit] when ST1 (Forward rotation start) is inputted. After MEND (Travel completion) is
outputted, the time has passed set with [Pr. PT39] and the torque limit will change from [Pr. PA11 Forward rotation torque limit] or
[Pr. PA12 Reverse rotation torque limit] to the setting value of [Pr. PC35 Internal torque limit 2].
Device/parameter to be used
Control mode selection of [Pr. PA01]
DI0 (Next station No. selection 1) to DI7 (Next
station No. selection 8)
MD0 (Operation mode selection 1)
MD1 (Operation mode selection 2)
SIG (External limit/Rotation direction decision/
Automatic speed selection)
[Pr. PC05]
RT (Second acceleration/deceleration
selection)
[Pr. PA11]
[Pr. PA12]
[Pr. PC35]
[Pr. PT39]
Shortest rotating indexer
Select "_ _ _ 8" (positioning mode (indexer method)).
Set any next station No. (Refer to (2) (c) in this
section.)
Switch off MD0.
Switch on MD1.
The rotation direction to a station No. will be as
follows.
Off: Station No. decreasing direction
On: Station No. increasing direction
Set a servo motor speed.
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]
Set a torque limit value in operation.
Set a torque limit value in stop.
Set a time period for switching from the torque limit
value in operation to that in stop.
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Setting