3 Product Description
C-863.12 Mercury Controller
MS249E
Version: 1.2.1
31
Parameters
Description and Possible Values
Reference Travel
Direction
0x47
Default direction for the reference move
0 = automatic detection
1 = negative direction
2 = positive direction
Closed-Loop Velocity
(Phys. Unit/s)
0x49
Velocity in closed-loop operation
For details, see "Generation of Dynamics Profile" (p. 18).
Velocity For Reference
Moves (Phys. Unit/s)
0x50
Velocity for reference move
Specifies the maximum velocity during a reference move for the
second approach of the switch selected. For high repeatability
during referencing, the maximum of this value should be as large as
the value of parameter 0x49. If the value of parameter 0x50 is set to
0, reference moves are not possible.
Distance Between Limit
And Hard Stop (Phys.
Unit)
0x63
Distance between the built-in limit switch and the hard stop
Determines the maximum stopping distance during reference
moves. The actual velocities during a reference move are calculated
on the basis of this value, the set deceleration (0xC) and the set
velocities (0x49 and 0x50).
Distance From Limit To
Start Of Ref. Search
(Phys. Unit)
0x78
Distance between limit switch and the starting position for motion
to the index pulse.
Distance For Reference
Search (Phys. Unit)
0x79
Maximum distance for motion to the index pulse
The parameters 0x78 and 0x79 are used for reference moves when
the two following conditions are met:
▪
The reference move is started with FRF.
▪
The
Reference Signal Type
parameter (0x70) has the value 2.
Sequence of the reference move:
1.
The axis moves to the negative limit switch.
2.
The axis moves the distance specified by parameter 0x78 away
from the limit switch.
3.
The axis moves to the index pulse and covers the maximum
distance specified by parameter 0x79.
INFORMATION
➢
For maximum repeatability, the reference move must always be done in the same way.