Mitsubishi Electric MR-JE-C, Instruction Manual

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12. WHEN USING WITH A GENERAL-PURPOSE INTERFACE
12 - 27
12.4.4 Count type homing
For the count type homing, after the front end of the proximity dog is detected, the position is shifted by the
distance set in [Pr. PT09 Travel distance after proximity dog] and [Pr. PT59 Travel distance after proximity
dog (extended parameter)]. Then, the position specified by the first Z-phase signal is used as the home
position. Therefore, when the on-time of DOG (proximity dog) is 10 ms or more, the length of the proximity
dog has no restrictions. When the dog type homing cannot be used because the length of the proximity dog
cannot be secured, input DOG (proximity dog) electrically from the controller and the like.
(1) Device/parameter
Set input devices and parameters as follows:
Item Device/parameter to be used Setting
Homing mode selection MD0 (Operation mode selection 1) Switch on MD0.
DI0 (Point table No. selection 1) to DI7 (Point
table No. selection 8) Switch off DI0 to DI7.
Home position return
direction [Pr. PT45 Home position return types] Select the homing direction with [Pr. PT45]. The
setting is shown as follows:
Address increasing direction: -2
Address decreasing direction: -34
Dog input polarity [Pr. PT29 Function selection T-3] Refer to section 12.4.1 (2) (b) to select the dog input
polarity.
Home position return speed [Pr. PT05 Home position return speed] Set the rotation speed until a dog is detected.
Creep speed [Pr. PT06 Creep speed] Set the rotation speed after a dog is detected.
Home position shift distance [Pr. PT07 Home position shift distance], [Pr.
PT57 Home position shift distance (extension
parameter)] After the front end of the proximity dog is passed, the
position is shifted by the travel distance and then is
specified by the first Z-phase signal. Set this to shift
the position of the first Z-phase signal.
Travel distance after proximity
dog [Pr. PT09 Travel distance after proximity dog],
[Pr. PT59 Travel distance after proximity dog
(extension parameter)] Set the travel distance after the front end of the
proximity dog is passed.
Acceleration time
constant/deceleration time
constant of homing [Pr. PT61 Home position return acceleration
time constant] or [Pr. PT62 Home position
return deceleration time constant] The acceleration/deceleration time constant of [Pr.
PT61] or [Pr. PT62] is used.
Set [Pr. PT60 Function selection T-8] to select the
parameters to be used.
Homing position data [Pr. PT08 Home position return position data],
[Pr. PT58 Home position return position data
(extension parameter)] Set the current position at the time of homing
completion.