Siemens SINAMICS S120 Combi Manual page 245

Parameter
"Zero pulse inactive time"
(before and after A=B=high)
"Zero pulse active time"
(while A=B=high and beyond)
Other signal levels according to the RS 422 standard.
1)
The absolute level of the individual signals varies between 0 V and VCC of the encoder system.
2)
Only with Article No. 6SL3055-0AA00-5CA2 and firmware version 2.5 SP1 or higher can this value be configured using
3)
software. For older firmware releases and Article Nos. less than 6SL3055-0AA00-5CA2, the "low" threshold applies.
t is not a specified value, but is the time between the falling edge of track A and the next but one rising edge of
4)
ALo-BHi
track B.
Additional information on setting the "Zero pulse active time" can be found in the manual: SINAMICS S120, Function
5)
Manual, tolerant encoder monitoring for SMC30
Table 10- 13 Encoders that can be connected
HTL bipolar 24 V
HTL unipolar 24 V
1)
TTL bipolar 24 V
TTL bipolar 5 V
SSI 24 V/5 V
TTL unipolar
Because the physical transmission media is more robust, the bipolar connection should always be used. The unipolar
1)
connection should only be used if the encoder type does not output push-pull signals.
A controller compares the encoder system supply voltage - sensed via the Remote Sense cables - with the reference
2)
supply voltage of the encoder system, and adjusts the supply voltage for the encoder system at the output of the sensor
module until the required supply voltage is obtained directly at the encoder system (only for 5 V encoder system power
supply).
SINAMICS S120 Combi
Manual, 11/2017, 6SL3097-4AV00-0BP7
Designation
t
Lo
t
Hi
5)
X520 X521
(SUB-D) (terminal)
Yes
Yes Yes (however, a bipolar connec-
tion is recommended)
Yes
Yes
Yes
10.2 Sensor Module Cabinet-Mounted SMC30
Threshold Min.
640
640
X531
(terminal)
Yes
1)
Yes
Yes
Yes
No
Encoder system connection
Max.
(t - t )/2
4)
ALo-BHi Hi
t - 2*t
Lo 4)
ALo-BHi
Track Remote Sense
monitoring
Yes
No
Yes
Yes At X520
No
Unit
ns
ns
2)
No
No
No
No
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