9
UK
7.1 Activation of the periphery fault message of the channels
1 to 4
By means of the parameter bits P1 and P2 you can define which measuring
channels can trigger a peripheral fault message (see table).
But irrespective of the defined parameters all 4 channels are always transferred
via the AS-Interface�
8 Measuring range
►
For the measuring ranges please refer to the following tables�
Range
-200...850 °C
Units
dec.
Units
hex.
LED
analo-
gue
Meaning
< -219�4 °C
32767
7FFF
flashing
short circuit
-219�4 °C���-200�1 °C -2194 ��� -2001 F76E ��� F82F on
below nominal
range
-200 °C���850 °C
-2000 ��� 8500
F830���2134
on
nominal range
850�1 °C���883�6 °C
8501 ��� 8836
2135 ��� 2090 on
above nominal
range
> 883�6 °C
32767
7FFF
off
wire break
8.1 Transmission time of the analogue values
The transmission time of the analogue values depends on the conversion
time of the analogue 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 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 temperature values ideally is 480 ms
(conversion time) + 140 ms (transmission time) = 620 ms.