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Mains frequency
Mains voltage
Operation blockage
Building Technologies Division
6.43.1
Monitoring mains voltage/mains frequency
The LMS14... monitors constantly mains voltage and mains frequency.
Monitoring mains voltage
If mains voltage drops below the threshold of AC 180 V, error message Undervoltage is
generated. The LMS14... assumes the Start prevention state.
The error is automatically canceled as soon as mains voltage returns to a level above
AC 185 V.
Monitoring mains frequency
Error message Mains frequency is triggered if the measured frequency drops below
42 Hz or exceeds 72 Hz. The LMS14... assumes the Start prevention state.
The error is automatically canceled as soon as mains frequency returns to a valid level.
Display of measured values
The voltages and frequencies currently measured can be read via the ACS700/ACS790
PC software, menu Production.
Line no.
Operating line
[3891.1]
Mains frequency
Mains frequency currently measured by the LMS14...
Line no.
Operating line
[3907.1]
Mains voltage
Mains voltage currently measured by the LMS14...
Line no.
Operating line
[6805.1]
Operation blockage
Off
On
Note!
Siemens delivers the LMS14 with the Operation blockage [6805.1] safety-related
parameter activated by default.
If the Operation blockage [6805.1] safety-related parameter has been activated, error
152 Parameterization error will be generated and the associated start prevention will be
applied.
To unblock the unit, you must set the value of the Operation blockage [6805.1]
parameter to Off using safety-related software/hardware tools (ACS420, ACS431, or
AGU2.56).
This measure prevents the LMS from being operated with the Siemens default settings
before the OEM has performed the necessary parameterization process.
Off
No blockage active.
On
Blockage active. Start prevention has been applied to the LMS14. Error 152 is
displayed.
User Manual LMS14...
6 The settings in detail
583/617
CC1U7471en
28.01.2015
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