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Siemens Commissioning Guide CM1G5192en
Building Technologies 10 Parameterization 29.07.2010
P2167 Switch-off frequency f_off
Sets frequency threshold below which VSD switches off.
Unit: Hz Min: 0.00 Def: 1.00 Max: 10.00
Level 3
Details If the frequency falls below this threshold, bit 01 in status word 2 (r0053) and bit 05 in r2197 is set.
Dependency: Switched off only if OFF1 or OFF3 active.
P2168 Delay time t_off
Defines time for which the VSD may operate below switch-off frequency (P2167) before switch
off occurs.
Unit: ms Min: 0 Def: 10 Max: 10000
Level 3
P2181 Belt failure detection mode
Sets belt failure detection mode.
Unit: - Min: 0 Def: 0 Max: 6
Level 3
Settings: 0=Belt failure detection disabled
1=Warn low torque / speed
2=Warn high torque / speed
3=Warn high / low torque / speed
4=Trip low torque / speed
5=Trip high torque / speed
6=Trip high / low torque / speed
Details: 2 alternative modes are provided of detecting the failure:
Belt failure detection without sensor:
This is achieved by comparing the actual frequency/torque curve with a programmed envelope (see P2182 - P2190). If
the curve falls outside the envelope, a warning or trip is generated.
Belt failure detection with sensor:
This method uses a pulse train from a simple sensor on the driven machine connected via digital input 5 (DIN5) to the
encoder circuit within the VSD’s ASIC. The pulse train, normally detecting one pulse per revolution of the drive machine
(can be adjusted via P0409), is converted to a frequency reference and compared with the actual VSD output frequency.
The encoder needs to be connected to DIN5 and is parametrised via P0409 and setting P0400=3. The maximum
permissible frequency deviation between VSD frequency and frequency of the pulse train is set via P2191. If the
deviation is exceeded, a warning or trip is generated. Note that parameters P2182 - P2190 have no effect in this mode.
P2182 Belt threshold frequency 1
Sets a frequency threshold F1 for comparing actual torque to torque the envelope for belt
failure detection.
Unit: Hz Min: 0.00 Def: 5.00 Max: 650.00
Level 3
Details: The frequency torque envelope is defined by 9 parameters – 3 are frequency parameters (P2182 - P2184), and the other
6 define the low and high torque limits (P2185 - P2190) for each frequency.
Note: The torque is unlimited below P2182, and above P2184. Normally P2182 <= lower torque limit (P1521), and P2184
>=upper torque limit (P1520).
P2183 Belt threshold frequency 2
Sets a threshold F2 for comparing actual torque to torque the envelope for belt failure detection.
Unit: Hz Min: 0.00 Def: 30.00 Max: 650.00
Level 3
Note: See P2182 (belt threshold frequency 1)
P2184 Belt threshold frequency 3
Sets a threshold F3 for comparing actual torque to torque the envelope for belt failure detection.
Unit: Hz Min: 0.00 Def: 50.00 Max: 650.00
Level 3
Note: See P2182 (belt threshold frequency 1).
P2185,
P2187, P2189
Upper torque threshold 1, 2, and 3
Upper limit threshold value 1, 2 and 3 for comparing the actual torque with the load torque at
frequency f_1, 2 or 3.
Unit: Nm Min: 0.0 Def: 99999.0 Max: 99999.0
Level 3
Note: See P2182 (belt threshold frequency 1)
P2186,
P2188, P2190
Lower torque threshold 1, 2, and 3
Lower limit threshold value 1, 2 and 3 for comparing the actual torque with the load torque at
frequency f_1, 2 or 3
Unit: Nm Min: 0.0 Def: 0.0 Max: 99999.0
Level 3
Note: See P2182 (belt threshold frequency 1).
P2191 Belt failure speed tolerance
P2191 defines the allowed speed variation bandwidth between the VSD frequency and the
speed reference from the pulse train. When the speed of the driven machine varies by more
than this amount, a trip or warning is given.
Unit: Hz Min: 0.00 Def: 3.00 Max: 20.00
Level 3
P2192 Time delay for belt failure
P2192 defines a delay before warning / trip becomes active. It is used to eliminate events
caused by transient conditions. It is used for both methods of fault detection.
Unit: s Min: 0 Def: 10 Max: 600
Level 3
r2197 CO/BO: Monitoring word 1
Monitoring word 1 which indicates the state of monitor functions. Each bit represents one
monitor function.
Unit: - Min: - Def: - Max: -
Level 3
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