Functions
7100.006424_Bus description_PSD4xx_CA_H_ENG 31
08.04.2020
The exception to this is if the target value is the same as before. In this case, proceed as
follows: Remove the release and reset it (bit 4 in the command byte). The drive then
continues to run when the release bit is set. Bit 2 ("Transfer target value") must also be set.
ATTENTION
Runs which intentionally involve a run to an obstruction (e.g.
reference runs to a block) may only be started with a reduced
current (max. operating current < 10% of nominal rated current
or smallest possible value).
4.6
Response of the drive if it is turned manually (adjustment function)
If the PSD4xx is rotated in the opposite direction from the loop
– when at a standstill, after a
correctly completed positioning run and the release bit (bit 4 in the control word) as well as
the adjustment bit (bit 10) are activated
– it will again attempt to run to the previously sent
target value (adjustment).
Note:
The device does not attempt to adjust if rotated in the direction of the loop, it
will merely set bit
11 of the status byte (“Manual rotation”) and reset bit 0 (“Target
position reached”). If the loop length (SDO #201F) is set to 0, the drive regulates in
both directions.
Note:
If the drive continually loses its position when at a standstill, it will attempt to
adjust whenever its actual position just leaves the positioning window (provided
that all of the above-mentioned conditions are met). At this time, the motor voltage
must be within the permissible range (i.e. bit 4 is set in the status byte).
No adjustment will start if the motor voltage is not in the permissible range.
Instead, bits 10 (“Positioning error”) and 13 (“Motor power not available”) will be
activated.
If the motor voltage only returns to the permissible range after leaving the
positioning window, no new adjustment attempt will start. This prevents a situation
in which the drive suddenly starts to move when the motor voltage is switched on.
If a positioning run or manual run is aborted while in progress by a stop command
(“Release” bit in control word to 0), the drive will only adjust when a new run command is
sent and completed correctly.
Deleting the release bit and/or adjustment function can completely prevent the adjustment
process.
