Siemens SINUMERIK MC Commissioning Manual page 194

Safety functions integrated in the drive
4.19 Safe actual value acquisition
Safety parameters
p9319/p9519
p9320/p9520
p9321/p9521
p9322/p9522
p9323/p9523
p9324/p9524
p9325/p9525
p9326/p9526
p9328/p9528
p9329/p9529
Encoder types for single and 2-encoder systems
Incremental encoders or absolute encoders can be used for safe acquisition of the position
values on a drive.
The absolute position values can be transferred via the serial EnDat interface or an SSI
interface to the controller. However, these are not evaluated by the safety functions.
In systems with encoders with SINAMICS Safety Integrated (single and 2-encoder systems),
the following encoders are permitted for safe actual value acquisition:
● Encoders with sin/cos 1 Vpp signals
– Single and 2-encoder systems
– Connected to the SINAMICS SME20/25, SME120/125 and SMC20 Sensor Modules
– The encoders must contain purely analog signal processing and creation. This is
● HTL/TTL encoders
– Can only be used for 2-encoder systems. In this case, one encoder must be an HTL/TTL
– Connected to an SMC30 Sensor Module Cabinet or SINAMICS S120 Combi.
– It is not permissible that an HTL/TTL encoder connected to SINAMICS S120 Combi is
– Note the lowest possible velocity resolution (r9732[1]) for an HTL/TTL encoder system.
194
Designation
SI Motion fine resolution G1_XIST1
SI Motion leadscrew pitch
SI Motion gearbox encoder
SI Motion gearbox encoder
Redundant coarse position value valid bits
Redundant coarse position value fine resolution
bits
Redundant coarse position value relevant bits
SI Motion encoder assignment
SI Motion Sensor Module node identifier
Gx_XIST1 coarse position safety most significant
bit
necessary to be able to prevent the A/B track signals with valid levels from becoming
static ("freezing").
encoder. The other encoder can be a sin/cos encoder or an HTL/TTL encoder.
operated as the first encoder.
Encoder parameters
p0418
Encoder parameterizing
screen form
Encoder parameterizing
screen form
Encoder parameterizing
screen form
r0470
r0471
r0472
Encoder parameterizing
screen form
p0415 = r0470 – r0471
Safety Integrated (with SINAMICS S120)
Commissioning Manual, 02/2020, A5E46305916B AB