NAiS FP Series Hardware Manual

FP0 HardwareAnalog I/O Unit
4-18 Matsushita Electric Works (Europe) AG
4.7.2 Averaging for a Thermocouple Range
When the input range is set to a thermocouple (K, J or T type), processing like that
shown below is carried out internally in the analog I/O unit.
Operation
item
Time chart
Analog input
value ch0
(thermocouple
input)
4mV (K type thermocouple, 100°C)
41mV (K type thermocouple, 1000°C)
Reading time
(see note)
ch0
ch1
ch0
ch1
ch0
ch1
ch0
ch1
ch0
ch1
ch0
ch1
ch0
ch1
70m
sec
70m
sec
70m
sec
560msec
10001000100010090100100 1000
Internal
processing for
analog I/O unit
ch0
100 100 90
min
100 1000
max
(100+100+100) ÷3=100
100 100 1000 1000
max
(100+100+1000) ÷3=400
100 1000 1000 1000
max
(100+1000+1000) ÷3=700
1000 1000 1000
max
(1000+1000+1000) ÷3=1000
90
min
90
min
100
min
1000
Averaging of results from 3 times, with maximum/minimum
values deleted
Digital output
value (WX)
(temperature °C)
K1000
K700
K400
K100
560msec
Starting from the most recent data, the data from the last five times is taken. The
maximum and minimum values are deleted, and then averaging is carried out on the
remaining three items. The value obtained from the most recent averaging is normally
used as the value output at this time. (If a fraction results from the calculation, it is
rounded off.)
Note
In the read timing, the minimum and maximum values are
subtracted from the data from the last ten times, just as in
averaging processing on page 4-17, and the data from the
remaining eight times is used for the averaging.

NAiS FP Series Specifications

General

Brand	NAiS
Model	FP Series
Category	Controller
Language	English