Siemens LMV37.4 Series Basic Documentation page 8

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11.1 Function principle ......................................................................................... 111
11.2 Definition of angles ...................................................................................... 111
11.3 Referencing .................................................................................................. 112
11.3.1 Reference travel ........................................................................................... 113
11.4 Direction of rotation ...................................................................................... 115
11.5 Monitoring the actuator positions ................................................................. 116
11.6 Changing the error detection band for monitoring the actuator positions .... 118
11.7 Forced travel ................................................................................................ 118
11.8 Detection of line interruptions ...................................................................... 118
11.9 Protection against actuator mixup ................................................................ 119
11.9.1 Proposal for implementation ........................................................................ 119
12 Fan control ................................................................................................. 120
12.1 Function principle ......................................................................................... 120
12.2 Activation of VSD/PWM fan ......................................................................... 120
12.3 VSD control X74 pin 3 .................................................................................. 121
12.4 PWM fan control X64 pin 3 .......................................................................... 121
12.5 Safe separation of mains voltage and protective extra low-voltage ............. 122
12.6 Ramp time .................................................................................................... 122
12.7 Acquisition of speed ..................................................................................... 123
12.7.1 Acquisition of speed with proximity switch ................................................... 123
12.7.2 Acquisition of speed with Hall generator ...................................................... 124
12.8 Speed control ............................................................................................... 125
12.9 Speed supervision ....................................................................................... 126
12.10 Setting the parameters of VSD .................................................................... 127
12.11 Standardization of speed ............................................................................. 128
12.12 Control of fan motor with pneumatic air-fuel ratio control ............................ 131
12.13 EMC of LMV37.4... and VSD ....................................................................... 131
12.14 Description of connection terminals ............................................................. 132
12.14.1 VSD .............................................................................................................. 132
12.14.2 PWM fan ...................................................................................................... 132
13 Load output X74 pin 3 ............................................................................... 133
13.1 Safe separation of mains voltage and extra low-voltage ............................ 133
13.2 Modulating operation ................................................................................... 133
13.3 2-stage operation ......................................................................................... 133
13.4 3-stage operation ......................................................................................... 134
14 Fuel meter input X75 pin 1 / X75 pin 2 ..................................................... 135
14.1 Configuration of fuel meter ........................................................................... 135
14.1.1 Types of fuel meters .................................................................................... 135
14.1.2 Configuration of pulses per volume unit ....................................................... 135
14.1.3 Reading and resetting the meter readings ................................................... 135
14.2 Fuel throughput ............................................................................................ 136
14.2.1 Configuration ................................................................................................ 136
14.2.2 Reading out the fuel throughput ................................................................... 136
Basic Documentation LMV37.4...
Contents
CC1P7546en
20.09.2013