Delay Times - Pepperl+Fuchs VBA-2E-KE5-IJL Manual

VBA-2E-KE5-IJL/UJL
Appendix
Voltage Input Measurement Ranges
Voltage: 0 V ... 10 V
Input signal [V]
> 11.5
10.001 ... 11.5
0 ... 10
< 0
Table 7.3
1.Measurement accuracy corresponds to the nominal range
Caution!
Maximum input voltage
The input voltage at the voltage input must not exceed 50 V.
7.2

Delay Times

The analog input module requires a certain amount of time to convert and transmit the analog
measuring signals to the AS-Interface master. This time span is mainly composed of the
conversion time and the transmission time. The conversion time and transmission time depend
on a number of factors.
Latency
Latency = delay of a signal under worst case conditions.
The analog-to-digital conversion in the analog module and the transmission via AS-Interface is
not in sync. In the worst case, the transmission of a channel via AS-Interface starts just before
the conversion of this channel is completed within the module. This gives rise to two scenarios:
1. The conversion time is longer than the transmission time
Latency = Conversion time + Transmission time * (Number of channels +1)
2. The conversion time is shorter than the transmission time
Latency = Conversion time * (Number of channels +1) + Transmission time
16
Display on the master Input LED
32767
10001 ... 11500
0000 ... 10000
0000
Measurement range 0 V ... 11.5 V
Above threshold
(peripheral fault)
1
Extended range
Nominal range
Below threshold