Operating instructions

44 Application manual Positioning 04/08
4.4.1.1 Motion mode "absolute"
Parameter Motion Mode 1208 = "0 – absolute":
The target position is the position adjusted in the motion block at
Target Posi-
tion/Distance
1202.
Target position relates to the fixed reference position (point of reference for posi-
tioning) which is determined by a homing operation. An absolute distance is cov-
ered, referred to the reference position.
When the target position is reached, logic signal "282 Target Position Reached" is
set. The signal is reset when the next motion block is started or the drive leaves the
target window (monitoring of current position at end of positioning).
In operation mode 60 or 160 (inverter), the logic signal "Target Position Reached"
can be output via a digital output.
4.4.1.2 Motion mode "relative"
Parameter Motion Mode 1208 = "1 – relative":
A relative positioning operation relates to a position which was reached before. This
may be the last target position or the current position reached in manual JOG mode.
If the last position was reached through a motion block positioning operation,
Tar-
get Position/Distance
1202 indicates the value of a position in relation to the last
target position, regardless of whether it was reached or not.
New target position = last target position + relative distance
If the last position was reached through a manual JOG operation, the value of pa-
rameter
Target Position/Distance 1202 is a relative position relating to the current
position.
New target position = current position + relative distance
Application manual Positioning 04/0844