Instruction Manual PSE2xxMod
8
2.7 LEDs
The green LED represents the state of the motor supply voltage, the red and yellow
LED represent the Modbus and the device state.
Yellow LED
Switched ON during frame reception or sending.
Red LED
Switched ON: internal fault
Flashing: Other faults
Green LED
Switched ON: device powered (motor supply)
2.8 Start-up
Positioning sequence (with loop)
The PSE2xxMod differs between the following steps of a positioning sequence
(Presumption: the target position is always approached through forward motion):
1. New position value is larger than the current value: position approached directly.
2. New position value is smaller than the current value: the device reverses an
additional 5/8 of one rotation and approaches the exact position after resuming
forward motion.
3. New position value after reverse run without loop: the device always approaches
the position by moving in forward direction; if necessary, it will first reverse by 5/8
of a rotation.
Once the target position has been reached, the devices with multiturn encoder
compare this position to the internal absolute encoder status. If a discrepancy is
detected, the device sets the
“flash memory or encoder error” bit (bit 9) in the status
word.
Positioning sequence (without loop)
The “positioning without loop” mode is used primarily for moving small distances
involved in fine adjustments. In this case, each position is approached directly. This
does NOT eliminate any backlash present in the spindle. The PSE2xxMod internal
gear backlash does not play a role in this case, as position data is acquired directly at
the output shaft.
Runs which involve specifically a block run (e.g. reference runs on block),
may only be started with reduced torque (max. torque max. 10% of the
nominal torque).
