IFM Electronic AT-interface AC2516 Notice De Montage page 17

Analogue input module 0 ... 10 V - AC2517
Range
0 ... 10 V
0 ... 10 V
10.001 V ...
11.5 V
> 11.5 V
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 modu-
le and on the transmission time via the AS-Interface.
Example: Transmission time of 2 analogue channels
The conversion time for 2 analogue input signals into digital signals is
120 ms. The transmission time of the 2 16-bit values via the AS-inter-
face ideally is 7 AS-i cycles per value. For a cycle time of 5 ms per ASi
cycle this results in a transmission time of 2 x 7 x 5 ms = 70 ms via the
AS-Interface.
Thus the total transmission time for 2 analogue values ideally is 120 ms
(conversion time) + 70 ms (transmission time) = 190 ms.
Example: Transmission time of 4 analogue channels
The conversion time for 4 analogue input signals into digital signals is
240 ms. The transmission time of the 4 16-bit values via the AS-inter-
face ideally is 7 AS-i cycles per value. For a cycle time of 5 ms per
AS-i cycle this results in a transmission time of 4 x 7 x 5 ms = 140 ms
via the AS-Interface.
Thus the total transmission time for 4 analogue values ideally is 240 ms
(conversion time) + 140 ms (transmission time) = 380 ms.
Units
dec.
0000 ... 10000
10001 ... 11500
32767
Units
hex.
0000 ... 2710
2711 ... 2CEC
7FFF
LED
analogue
on nominal range
on above nominal
flashes outside range
Meaning
range
17