Operating Instructions

SED2 VFD Operation & Maintenance Manual
160 Siemens Building Technologies, Inc.
Details: Sets belt failure detection mode. This function allows detection of mechanical failure of the drive train, for example,
a broken drive belt. It can also detect conditions which cause an overload, such as a jam.
Two methods are provided of detecting the failure.
The fist 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.
The second uses a pulse train from a simple sensor on the driven machine connected to the encoder circuit within
the drive ASIC via a digital input. The pulse train, normally detecting one pulse per revolution of the drive machine,
is converted to a frequency reference and compared with the actual inverter output frequency.
Enum: 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
P2182 Belt threshold frequency 1
Min: 0.00 Def: 5.00 Max: 650.00
Level 3
Details: Sets a frequency threshold F1 for comparing actual torque to torque the envelope for belt failure detection.
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
Min: 0.00 Def: 30.00 Max: 650.00
Level 2
Details: Sets a threshold F2 for comparing actual torque to torque the envelope for belt failure detection.
Note: See P2182 (belt threshold frequency 1).
P2184 Belt threshold frequency 3
Min: 0.00 Def: 50.00 Max: 650.00
Level 2
Details: Sets a threshold F3 for comparing actual torque to torque the envelope for belt failure detection.
Note: See P2182 (belt threshold frequency 1).
P2185, P2187,
P2189
Upper torque threshold 1, 2, and 3
Min: 0.0 Def: 99999.0 Max: 99999.0
Level 2
Details: Upper limit threshold value for comparing actual torque.
Note: See P2182 (belt threshold frequency).