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*1 The measurement range available for degree Celsius is not available for degree Fahrenheit, of which the
upper-limit measurement is set lower than degree Celsius, since the digital value (temperature value
displayed) for degree Fahrenheit is bigger than that for degree Celsius.
*2 When the thermocouple is broken, the digital value will become K8000 or K16000 within 70 seconds
since broken. Practice in the ladder program a process for avoiding a risk, would be resulting from a
broken thermocouple, and exchange the thermocouple.
*3 Until the conversion data will be ready after the initial startup was made, the digital value shows K8001
or K16001. Those are not a temperature data. Create a ladder program, so that they are not acquired as
a temperature data.
*4 The settings of the Input channel selection switch.
*5 Conversion values for 6-time measurements (6 from the latest 8 measurements, excluding the Max. and
Min.) are averaged, so that it takes time for the digital value to be displayed due to the rapid temperature
change.
*6 The Control Unit reads the data for 2 channels per 1 scan by the Control Unit.
Read the data using the program described in 7.2.
*7 This changes depending on where the Thermocouple Unit is installed. (This is when the Thermocouple
Unit is installed in the 1st.)
-
Insulation outline
Analog input
circuit
PhotoMos relay
channel switch
circuit (insulated
between
channels)
FP
Σ
/FP0
Control Unit
I/F
Photo-coupler
insulation
DC-DC converter
insulation
Bus
+5 V
CH0
CH7
Thermocouple Unit
to
24 V DC
(Increased
amount 25mA
Max.)
16