Operation Function: Reference Position Return - Mitsubishi Electric M800VW Series Programming Manual

M800V/M80V Series PLC Programming Manual (2/2)
14 PLC Help Function
14.34 PLC Axis Indexing

14.34.2.6 Operation Function: Reference Position Return

Reference position return is executed.
PLC axis indexing allows the reference position return at high-speed which returns the axis to the machine coordinate zero
point determined by the absolute position initialization set.
Refer to "14.34.3.6 Absolute Position Zero Point Initialization Set: Machine End Stopper Method" and "14.34.3.7 Absolute
Position Zero Point Initial Setting: Marked Point Alignment Method" for the details of the method.
Manual operation speed set in the selected operation parameter group will be applied in the reference position return.
Note
(1) Dog-type reference position return is not available for the axis used in PLC axis indexing.
Preparation
Set the following signals before operation.
Abbreviation Signal name
ZRN Reference position return mode
Operation
Turning ON Operation start (ST) starts the reference position return.
Note
(1) When the torque limit value of the operation parameter group selected at turning-ON of operation start is set to "0", the
operation error (M01 0167) occurs and the axis movement by the reference position return at high-speed cannot be per-
formed.
POINT
(1) An operation alarm "M00 0003 R-pnt direction illegal" will occur when the axis is moved in opposite direction to
the reference position in high-speed reference position return. Make sure to move the axis in correct direction.
(2) An operation alarm "M01 0161 Aux ax R-pnt ret incomplete" will occur when the reference position return is ex-
ecuted without absolute position initialization set.
(3) An operation alarm "M00 0024 Aux ax R ret invld at abs alm" will occur when the reference position return is
executed while an absolute position detection-related alarm is shown.
(4) An operation alarm "M00 0025 Aux ax R ret invld at ini" will occur when the reference position return is executed
in the absolute position initialization setting.
(5) The axis will be returned to the basic machine coordinate system zero point by the reference position return in
PLC axis indexing. Settings for "#2037 G53ofs Reference position #1" to "#2040 #4_rfp Reference position #4"
will not be concerned.
IB-1501668-B
Use this signal to select reference position return mode. Setting two different op-
eration modes at the same time will cause the operation error (M01 0101).
834
Explanations