8-32
Drive Functions
MPH-02, MPB-02, MPD-02
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
Shifting the position data reference affects the motor encoder and, if
available, the external encoder, independent of which encoder is the
active encoder for position control. If different actual position values are
valid for the encoders (both encoders possibly have position data
reference independent of each other), the actual position values of both
measuring systems are shifted by the same difference.
Pertinent Parameters
•
S-0-0197, C3300 Set coordinate system procedure command
•
S-0-0198, Initial coordinate value
•
S-0-0199, C3400 Shift coordinate system procedure command
•
S-0-0275, Coordinates of offset value
•
S-0-0283, Current coordinate offset
Pertinent Diagnostic Messages
•
C3300 Set coordinate system procedure command
•
C3400 Shift coordinate system procedure command
Functional Description
Shifting the position data reference affects the current actual position
value of the encoders connected to the drive (motor encoder and external
encoder). Whether the current actual position value has position data
reference to the axis or not is irrelevant for the shifting of the position data
reference! The shifting is carried out on the drive-side by means of a
command started by the master.
Note:
The reference status of the actual position values is not
affected by the shifting of the position data reference!
If the position data reference is shifted several times in succession
without the drive having been switched to communication phase 2, the
shifted values act in an additive way! The total offset with regard to the
original actual position value is stored in parameter
S-0-0283, Current
coordinate offset
.
The offset of the position data reference is reset by switching the drive to
communication phase 2. Therefore, there cannot be any active offset of
position data reference when the drive is switched on the first time,
because former offsets are cleared when the drive is switched off.
Note:
After resetting the offset by switching to communication
phase 2 the position data reference has to be established
again for relative measuring systems, if necessary!
If the position data reference of the encoders to the axis is established
(
C0300 Command Set absolute measuring
or
C0600 Drive-controlled
homing procedure command
) with active offset of the actual position
values (S-0-0283 unequal "0"), the new, homed actual position value is
already displayed in offset form (in S-0-0051 or S-0-0053). The offset is
not cleared by establishing the position data reference!
When the control master triggers the
C3300 Set coordinate system
procedure command
(S-0-0197), the drive becomes independent of the
command values preset by the master and goes to standstill in a drive-
controlled way. Deceleration takes place according to the
A0010 Drive
HALT
function.
Operating Principle of Function
"Shifting Position Data
Reference"
Resetting "Shifting Position
Data Reference"
Establishing Position Data
Reference for "Shifted"
Measuring System
"Set Coordinate System
Procedure" Command
Courtesy
of
CMA/Flodyne/Hydradyne
▪
Motion
Control
▪
Hydraulic
▪
Pneumatic
▪
Electrical
▪
Mechanical
▪
(800)
426-5480
▪
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