IFM Electronic AC2620 Montageanleitung Seite 11

• LED green (AS-i) on:
• LED red (FAULT) on:
LED red (FAULT) flashing:
*Periphery fault
A periphery fault is indicated if at least one of the signals analog 1,
analog 2, analog 3 or analog 4 is outside the measuring range or noth-
ing is connected to at least one analog channel.
Measuring range of the Pt100 module
Range
-200 ... +850°C
< -219.4°C
-219.4°C ...
-200.1°C
-200°C ...
+850°C
+850.1°C ...
+883.6°C
> +883.6°C
Transmission time of the analog values
The transmission time of the analog values depends on the conversion
time of the analog signals into digital signals in the AS-i module and
on the transmission time via the AS-Interface.
The conversion time for 4 Pt100 signals is 480 ms.
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 5 ms per AS-i cycle this
results in a transmission time of 4 x 7 x 5 ms = 140 ms via the AS-Inter-
face.
Thus the total transmission time for 4 temperature values ideally is 480 ms
(conversion time) + 140 ms (transmission time) = 620 ms.
Units
dec.
32767
-2194 ... -2001
-2000 ... 8500
8501 ... 8836
32767
AS-i voltage is applied
AS-i communication error
periphery fault*
Units
hex.
7FFF
F76E ... F82F
F830 ... 2134
2135 ... 2090
7FFF
LED Meaning
analog
flashes short circuit
on below nominal
on nominal range
on above nominal
off wire break
range
range
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