Siemens S120 - Page 374

Supplementary system components and encoder system integration
8.1 Sensor Modules
AC Drive
374 Manual, (GH6), 04/2014, 6SL3097-4AL00-0BP4
Connectable encoder systems
Table 8- 18 Specification of encoder systems that can be connected
Parameter
Designation
Threshold
Min.
Max.
Unit
High signal level
(TTL bipolar at X520 or X521/X531)
1)
U
Hdiff
2 5 V
Low signal level
(TTL bipolar at X520 or X521/X531)
1)
U
Ldiff
-5 -2 V
High signal level
(HTL unipolar)
U
H
3)
High
17
V
CC
V
Low
10
V
CC
V
Low signal level
(HTL unipolar)
U
L
3)
High
0
7
V
Low
0
2
V
High signal level
(HTL bipolar)
2)
U
Hdiff
3 V
CC
V
Low signal level
(HTL bipolar)
2)
U
Ldiff
-V
CC
-3 V
High signal level
(SSI bipolar at X520 or X521/X531)
1)
U
Hdiff
2 5 V
Low signal level
(SSI bipolar at X520 or X521/X531)
1)
U
Ldiff
-5 -2 V
Signal frequency f
S
- 300 kHz
Edge clearance
t
min
100
-
ns
"Zero pulse inactive time"
(before and after A=B=high)
t
Lo
640 (t
ALo-BHi
- t
Hi
)/2
4)
ns
"Zero pulse active time"
(while A=B=high and beyond)
5)
t
Hi
640 t
ALo-BHi
- 2*t
Lo
4)
ns
1)
Other signal levels according to the RS 422 standard.
2)
The absolute level of the individual signals varies between 0 V and VCC of the encoder system.
3)
Only with order number 6SL3055-0AA00-5CA2 and firmware version 2.5 SP1 or higher can this value be configured
using software. For older firmware releases and Order Nos. less than 6SL3055-0AA00-5CA2 then the "low" threshold
applies.
4)
t
ALo-BHi
is not a specified value, but is the time between the falling edge of track A and the next but one rising edge of
track B.
5)
Additional information on setting the "Zero pulse active time" can be found in the manual: SINAMICS S120, Function
Manual, tolerant encoder monitoring for SMC30