Siemens SED2 Service Manual download pdf (Page 59)

Chapter 6 – Programming

Siemens Building Technologies, Inc. 51

• Add ±15% to the torque derived from the setting of the frequency limit values to define a

permissible tolerance band for the torque values.

Upper Limit Factory setting: 99999.0

Lower Limit Factory setting: 0.0.

P2192, Alarm delay

P2192 allows for setting an alarm delay (between 0 to 65 seconds) before a warning or error

message occurs. This parameter helps avoid false alarms caused by temporary transition states.

This delay can also be used for belt failure detection via sensor.

Factory setting: 10 seconds

In manual mode, vary the torque frequency in the selected range to check the function. Then,

change over to automatic control.

Belt Failure Detection with Sensor (P0400)

SED2

Ventilator

5192Z23de

Sensor

Motor

Figure 34. Belt Failure Detection with Sensor (P0400).

A simple sensor (inductive sensor) mounted to the drive unit (such as for a fan) supplies one

pulse for each rotation. The pulse train generated this way, which can vary from 1 to 20,000

pulses per minute, is sent to SED2 digital input DIN5. The frequency resulting from the pulse train

is compared to the present output frequency of the SED2.

Select Encoder Type parameter P0400 defines the encoder type. If parameter P0400 is set to 0

(factory setting) so belt failure detection is disabled, belt failure detection without sensor (P2181)

is used instead.

Only DIN5 works with a counter signal.

Parameter Settings for Belt Failure Detection with Sensor (Commissioning)

Determine the speed transformation ratio between the motor and the shaft driven by the belt.

P0400, Encoder type

Define the encoder type using parameter P0400. Possible settings:

0 Disabled (factory setting).

1 Single channel encoder.

2 Quadrature encoder without zero pulse.

3 External pulse train.

12 Quadrature encoder with zero pulse.

1 2 ... 54 55 56 57 58 59 60 61 62 63 64 ... 153 154

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Siemens SED2 Service Manual Page 59