Siemens SINAMICS S120 Function Manual page 189
Safety integrated
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- Function manual (1094 pages) ,
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the actual position value does not exceed the 16-bit format. If the actual position value
exceeds the range that can be displayed with 16 bits (±32767), a STOP F is initiated and
message C01711 is output with fault value 7001. Depending on the scaling factor, this
means that ranges with different sizes can be monitored with varying accuracy. Example:
– Scaling factor: 1000
– Unit: 1 μm (linear axis)
– Position value: ±32767 mm
It may therefore be precisely monitored in a range of ±32.767 m to an accuracy of 1 mm.
Note
Scaling to 16 bits
The scaling is performed by dividing the mean value of r9708[0] and r9708[1] with this
scaling factor.
Example: For a position of -29.999 mm signaled in r9708[0] and r9708[1] and a scaling
factor of p9574 = 1000, a numerical value of -29 is signaled to the controller.
Value range r9708
The diagnostics information in parameter r9708 is displayed with the following properties:
Table 4- 5
Position values
Unit
Comment
What is shown in parameter r9713 is identical to the values of r9708; however, in
SINAMICS-internal calculation units.
Speed calculation
The control must calculate the speed from the position change:
●
Pos diff = Pos new - Pos old
●
Cycle diff = cycle counter new - cycle counter old
●
Timediff = Cyclediff · Safetycycle
(If
●
v = Pos diff/time diff
●
Format v
Acceptance test
An acceptance test is not required for the "Transfer safe position values" function, but the
function that was implemented with the aid of SP must be accepted in the higher-level
controller.
Safety Integrated
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Value range and resolution (32 bits)
= 0, the speed that was last calculated must be used.)
Cyclediff
Description of Safety Integrated functions
4.3 Safety Integrated Advanced Functions
Linear axis
±737280000
1 μm
Monitoring ±737.280 m with an
accuracy of 1 μm
Rotary axis
±737280000
0.001 °
≙ 2048 revolutions
187
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