Siemens SINAMICS S120 Function Manual page 191

Reference time stamp
Reference MT_ZS2
Reference MT_ZS3
Reference MT_ZS4
Examples for determining the reference values of the probe evaluation in hex:
● 0000 = 0 hex = time stamp from probe 1 falling edge
● 1000 = 8 hex = time stamp from probe 1 rising edge
● 0001 = 1 hex = time stamp from probe 2 falling edge
● 1001 = 9 hex = time stamp from probe 2 rising edge
Measurement buffer
Each measuring pulse input of a Control Unit 320-2 or 310-2 has one memory for maximum 16
measured value entries (8 rising and 8 falling edges).
The measured values for rising and falling signal edges are sequentially written to the memory.
If the memory is full and a new measured value is entered, all entries move down by one
location and the oldest value drops out. This means that in the case of an overflow the latest 16
values are contained in the memory. When reading out an entry, the oldest value is taken from
the memory. The remaining entries move down and make space for a new entry (FIFO
principle).
Remarks
Other applications can also read the probe status and evaluate the probe measured values.
Example
EPOS controls its probes axis-specifically. A control system can connect to the probe to read
its data and integrate the information into the drive telegram.
Drive functions
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Probe bit, binary values
Bits 4...6:
000: MT_ZS2 from MT1
001: MT_ZS2 from MT2
‑
110: MT_ZS2 from MT7
111: MT_ZS2 from MT8
Bits 8...10
000: MT_ZS3 from MT1
001: MT_ZS3 from MT2
‑
110: MT_ZS3 from MT7
111: MT_ZS3 from MT8
Bits 12...14
000: MT_ZS4 from MT1
001: MT_ZS4 from MT2
‑
110: MT_ZS4 from MT7
111: MT_ZS4 from MT8
Servo control
5.22 Central probe evaluation
Edge selection bit
Bit 7:
0: MT_ZS2 falling edge
1: MT_ZS2 rising edge
Bit 11:
0: MT_ZS3 falling edge
1: MT_ZS3 rising edge
Bit 15
0: MT_ZS4 falling edge
1: MT_ZS4 rising edge
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