IFM Electronic AS-Interface AC2220 Montageanleitung Seite 13

Transmission time of the analogue values
The transmission time of the analogue values depends on the conver-
sion time of the analogue signals into digital signals in the AS-i mod-
ule and on the transmission time via the AS-Interface.
The conversion time for 4 Pt100 signals is 480ms.
The transmission time of the 4 16-bit values via the AS-Interface ideal-
ly is 7 AS-i cycles per value. For a cycle time of 5ms per AS-i cycle this
results in a transmission time of 4 x 7 x 5ms = 140ms via the AS-Inter-
face.
Thus the total transmission time for 4 temperature values ideally is
480ms (conversion time) + 140ms (transmission time) = 620ms.
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