Central Probe Evaluation Examples - Siemens Sinamics S120 Function Manual

Servo control
3.19 Central probe evaluation
Reference time stamp
Reference MT_ZS4
Examples for determining the reference values of the probe evaluation in hex:
0000 = 0H = time stamp from probe 1, falling edge
1000 = 8H = time stamp from probe 1, rising edge
0001 = 1H = time stamp from probe 2, falling edge
1001 = 9H = 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 (FIFO principle). 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.
Remarks
Other applications can also read the probe status and evaluate the probe measured values.
Example:
EPOS controls "its" probes on an axis-for-axis basis. A control system can connect to the
probe to read its data and integrate the information into the drive telegram.
3.19.1

Central probe evaluation examples

Examples of probe evaluation
Hex values in MT_ZSB from the above example:
● 0 = time stamp from probe 1, falling edge
● 8 = time stamp from probe 1, rising edge
● 1 = time stamp from probe 2, falling edge
● 9 = time stamp from probe 2, rising edge
134
Probe bit, binary values
Bits 12...14
000: MT_ZS4 from MT1
001: MT_ZS4 from MT2
-
110: MT_ZS4 from MT7
111: MT_ZS4 from MT8
Edge selection bit
Bit 15
0: MT_ZS4 falling edge
1: MT_ZS4 rising edge
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Drive functions