Siemens SINAMICS G180 - Page 165

Operation
8.5 Special functions
Installation and Operating Instructions SINAMICS G180
Operating Instructions, 02/2019, 4BS0751-007
163
Set the following parameters if a frequency value is needed for the further processing:
Table 8- 11 Parameter setting for speed sensor with frequency value
Parameter
Value
"P-PULSE INPUT/Mode"
"f < 20 kHz"
"P-PULSE INPUT/Max.plse." "100 Hz"
"P-PULSE INPUT/Pulses/360"
"4"
The frequency is available for further processing as "Freq.act." from 0 Hz to 100 Hz and as
"Pulse act" from 0 % to 100 %.
NPN sensors cannot be used.
Two-channel digital tachometer with HTL output
Figure 8-29 Digital tachometer, two-channel, HTL level
Assumption: digital tachometer produces 1,024 impulses per revolution for four-pole motor,
nmax = 1500 rpm
Note the following:
● Connection according to connection diagram. You must keep input -X2:29 free. Bit pool
bits X2:27 to X2:29, PTC X2:27 and PTC X2:28 are permanently set to 0.
● Check the frequency in the range from 20 kHz to 205 kHz:
1500 rpm / 60 s × 1024 impulses = 25.6 kHz
Select the following values for the respective parameters:
Table 8- 12 parameter setting for digital tachometer
Parameter
Value
"P-PULSE INPUT/Mode"
"Tacho 2-track"
"P-PULSE INPUT/Max.plse."
"1500 rpm"
"P-PULSE INPUT/Pulses/360"
"1,024"
The speed is available for further processing as "Tacho act" from 0 rpm to 1500 rpm and as
"Pulse act" from 0 % to 100 %.