Siemens LMV37.4 Series - Page 136

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Building Technologies Basic documentation LMV37.4... CC1P7546en
12 Fan control 17.12.2018
6. Close the standardization
When standardization is successfully completed, reset parameter 641 to 0.
If standardization was not successful, parameter 641 assumes a negative value.
No. Parameter
641
Control of VSD’s speed standardization
Error diagnostics of negative values (refer to error 82)
0 = no speed standardization
1 = speed standardization active
The value provides information on the cause of fault:
Value Error Remedy
-1 Timeout of standardization (VSD’s ramp down
time too long)
Timeout at the end of standardization during ramp down
of VSD.
→ VSD ramp time settings are not shorter than those of
the LMV37.4 (parameter 523).
-2 Storage of standardized speed not
successful
Error during storage of standardized speed
 lock the LMV37.4 and reset it again, repeat
standardization
-3 Line interruption speed sensor LMV37.4 receives no pulses from the speed sensor.
1. Motor does not run.
2. Speed sensor is not connected.
3. Speed sensor is not actuated by the sensor disk
(check distance).
-4 Speed variation / VSD ramp up time too long /
speed below minimum limit for standardization
Motor has not reached a stable speed after ramp up.
1. VSD ramp time settings are not shorter than those
of the LMV37.4 (parameters 522, 523).
2. VSD’s characteristic is not linear. Configuration of
voltage input at the VSD must accord with the
configuration of the LMV37.4 (DC 0…10 V).
3. VSD does not follow quickly enough the change of
the LMV37.4. Check VSD settings (input filter,
slippage compensation, hiding various speeds).
4. Speed of VSD lies below the minimum for
standardization (650 rpm).
-5 Wrong direction of rotation Motor’s direction of rotation is wrong.
1. Motor turns in the wrong direction
 change parameterization of the direction of
rotation or inter change 2 live conductors.
2. Sensor disk is fitted the wrong way
 turn sensor disk.
-6 Unplausible sensor signals The required pulse pattern (60°, 120°, 180°) has not
been correctly identified.
1. Speed sensor does not detect all tappets of the
sensor disk
 check the distance.
2. As the motor turns, other metal parts are detected
also, in addition to the tappets
 improve mounting.
3. Electromagnetic interference on the sensor lines
 check cable routing, improve EMC.
-7 Invalid standardized speed Standardized speed measured does not lie in the
permissible range