Siemens SINAMICS G180 Installation And Operating Instructions Manual page 117

Two-channel digital tachometer with HTL output
Figure 8-29
Assumption: digital tachometer produces 1,024 impulses per revolution for four-pole motor,
nmax = 1500 rpm
Note the following:
● Connection according to connection diagram. Input ‑X2:29 cannot be used. Bits X2:27 to
● Check the frequency in the range from 20 kHz to 205 kHz:
Select the following values for the respective parameters:
Table 8-12
Parameter
"P-PULSE INPUT/Mode"
"P-PULSE INPUT/Max.plse."
"P-PULSE INPUT/Pulses/360"
The speed is available for further processing as "Tacho act" from 0 rpm to 1500 rpm and as
"Pulse act" from 0 % to 100 %.
Set the following values for the respective parameters if a frequency value is needed for the
further processing:
Table 8-13
Parameter
"P-PULSE INPUT/Mode"
"P-PULSE INPUT/Max.plse."
"P-PULSE INPUT/Pulses/360"
The frequency is available for further processing as "Freq.act." from 0 Hz to 25.6 kHz and as
"Pulse act" from 0 % to 100 %.
Installation and operating instructions Sinamics G180
Operating Instructions, 05/2013, 4BS0751-001
Digital tachometer, two-channel, HTL level
X2:29 are permanently set to 0, "PTC X2:27" to "PTC X2:29" are permanently set to 1.
1500 rpm / 60 s × 1024 impulses = 25.6 kHz
parameter setting for digital tachometer
parameter setting for digital tachometer with frequency value
Value
"Tacho 2-track"
"1500 rpm"
"1.024"
Value
"f > 20 kHz"
"25,600 Hz"
"1024"
Operation
8.5 Special functions
115