Siemens SINAMICS G150 Manual page 1446

4 Faults and alarms
4.2 List of faults and alarms
A07440 EPOS: Jerk time is limited
Message value: -
Message class: Error in the parameterization / configuration / commissioning procedure (18)
Drive object: VECTOR_G
Reaction: NONE
Acknowledge: NONE
Cause: The calculation of the jerk time Tr = max(p2572, p2573) / p2574 resulted in an excessively high value so that the jerk
time is internally limited to 1000 ms.
Note:
The alarm is also output if jerk limiting is not active.
Remedy: - increase the jerk limiting (p2574).
- reduce maximum acceleration or maximum deceleration (p2572, p2573).
A07441 LR: Save the position offset of the absolute encoder adjustment
Message value: -
Message class: Error in the parameterization / configuration / commissioning procedure (18)
Drive object: VECTOR_G
Reaction: NONE
Acknowledge: NONE
Cause: The status of the absolute encoder adjustment has changed.
In order to permanently save the determined position offset (p2525) and the determined number of the drive data set
(p2733), they must be saved in a non-volatile fashion (p0971, p0977).
Remedy: Not necessary.
This alarm automatically disappears after the offset has been saved.
F07442 (A) LR: Multiturn does not match the modulo range
Message value: -
Message class: Error in the parameterization / configuration / commissioning procedure (18)
Drive object: VECTOR_G
Reaction: OFF1 (OFF2, OFF3)
Acknowledge: IMMEDIATELY
Cause: The ratio between the multiturn resolution and the modulo range (p2576) is not an integer number.
This results in the adjustment being set back, as the position actual value cannot be reproduced after power-
off/power-on.
Remedy: Make the ration between the multiturn resolution and the modulo range an integer number.
The ratio v is calculated as follows:
1. Motor encoder without position tracking
v = (p0421 * p2506 * p0433 * p2505) / (p0432 * p2504 * p2576)
2. Motor encoder with position tracking for the measuring gear
v = (p0412 * p2506 * p2505) / (p2504 * p2576)
3. Motor encoder with position tracking for the load gear
v = (p2721 * p2506 * p0433) / (p0432 * p2576)
4. Motor encoder with position tracking for the load and measuring gear
v = (p2721 * p2506) / p2576
5. Direct encoder without position tracking
v = (p0421 * p2506 * p0433) / (p0432 * p2576)
6. Direct encoder with position tracking for the measuring gear
v = (p0412 * p2506) / p2576
Note:
With position tracking, it is recommended that p0412 and p2721 are changed
See also: p0412 (Measuring gear absolute encoder rotary revolutions virtual), p0432 (Gearbox factor encoder
revolutions), p0433 (Gearbox factor motor/load revolutions), p2721 (Load gear rotary absolute encoder revolutions
virtual)
Reaction upon A: NONE
Acknowl. upon A: NONE
1446
SINAMICS G130/G150
List Manual (LH2), 04/2014, A5E03263479A