NOTICE
Damage after reconnecting due to a charged P-843!
The P-843 can remain charged when the connecting cable is pulled out of the electronics
during operation. Reconnecting a charged P-843 to electronics during operation can cause a
mechanical impulse that will damage the P-843.
► Do not pull the connecting cable of the P-843 out of the electronics during operation.
► If the connecting cable of the P-843 is accidentally pulled out of the electronics during
operation: Switch off the electronics before you reconnect the P-843.
NOTICE
Destruction of the piezo actuator due to overheating!
Overheating can destroy the piezo actuator.
► Adjust the operating voltage, operating frequency and/or operating time so that the
maximum operating temperature (p. 28) of the piezo actuator is not exceeded; see
"Maximum Ratings" (p. 29) and "Determining the Operating Parameters" (p. 18).
NOTICE
Uncontrolled oscillation!
Oscillation can cause irreparable damage to the P-843. Oscillation is indicated by a humming
noise and can be caused by the following:
■ A change in the load and/or dynamics requires the servo-control parameters to be
adjusted.
■ The P-843 is operated near to its resonant frequency.
If you notice oscillation:
► In closed-loop operation, switch off the servo mode immediately.
► In open-loop operation, stop the P-843 immediately.
Starting and Operating the P-843
1. Start up the electronics (see the user manual for the electronics).
2. Configure the electronics for the P-843 during startup. If you are using a digital controller
from PI, run the PC software and select the entry in the positioner database that matches
the P-843 exactly.
3. Start a few motion cycles for testing purposes (see the user manual for the electronics).
7.3 Discharging the P-843
The P-843 must be discharged in the following cases:
■ When the P-843 is not in use but the electronics remain switched on to ensure
temperature stability
■ If the P-843 is accidentally disconnected from the electronics during operation
■ Before disassembling (e.g., before cleaning and transporting the P-843) as well as for
modifications
Requirements
✓
You have read and understood the general safety instructions (p. 8).
Tools and Accessories
■
Electronics from PI (p. 11)
7 STARTUP AND OPERATION
P843M0001EN ‒ 2/23/2021
22
M O T I O N | P O S I T I O N I N G
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