
Device parameters and interfaces
Leuze electronic
AMS 200
81
TNT
3
5/7-2
4
V
8
.2.1.1
SSI sequence diagram
Figure 8.6: SSI data transmission sequence diagram
Notice
!
In the default setting the
LSB
bit is the error bit.
Attention
!
Significance of the error bit
:
By default a 25th error bit (LSB) is appended to the 24-bit measurement value.
The error bit is not included in the Gray coding of the measurement value.
The error bit is 1 = active, 0 = not active.
Notice
!
The data can be read out with a clock rate between 80 kHz and 800 kHz.
Attention
!
Updating the measurement values on the SSI interface of the AMS 200
:
The measurement value on the SSI interface of the AMS 200 is updated every 1.6 ms (de-
fault) independent of the clock frequency.
The update rate on the interface can be reduced to 0.2 ms via the display under the SSI
menu item or in PROFIBUS module 17.
The shorter update rate is only valid for the SSI interface and has no influence on the
PROFIBUS DP interface.
Clock sequence
Complete transmission cycle