Siemens SIMATIC S7-300 Reference Manual page 348
Programmable logic controllers module data
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- Manual (676 pages) ,
- Installation and operating manual (356 pages) ,
- Hardware and installation manual (256 pages)
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Analog Modules
Temperature error (with
reference to the input range)
Linearity error (with
reference to the input range)
Repeat accuracy (in the
steady state at 25 °C,
referred to the output range
3)
Status, interrupts, diagnostics
Interrupts
•
Hardware interrupt
•
Diagnostic interrupt
Diagnostic functions
•
Group error display
•
Diagnostics information
read-out
1)
Open-circuit monitoring in 4 channels, Hardware operating mode is performed every 3 seconds.
2)
Series-mode rejection in 8 channels, software mode is reduced as follows:
50 Hz > 70 dB
60 Hz > 70 dB
400 Hz > 80 dB
3)
The operational limit comprises only the basic error of the analog input at Ta = 25 °C and the total
temperature error. The total error must cover the error for the compensation of the cold connection
point. Internal compensation of the cold connection point = max. 1.5 °C
External compensation of the cold connection point = accuracy of the used external RTD is +0.1 °C
External compensation of the cold connection point, where the connection point is held at 0 °C or 50
°C = accuracy of the connection point temperature control.
4)
Because of the slight rise over the range of approx. 0 °C to 85 °C, the lack of compensation of the
comparison point temperature only has a negligible effect on a type B thermocouple. If there is no
compensation and the measuring method "Compensation to 0 °C" is set, the deviation in the type B
thermocouple duringtemperature measurement is: 200 °C to 1802 °C <0.5 °C
4-142
±0.005%/K
± 0.02%
±0.01%
Programmable
(channels 0 to 7)
Programmable
Programmable
Red LED (SF)
Possible
Data for Selecting a Sensor
Input ranges (rated values)/
input resistance
•
Thermocouples
Maximum input voltage for
voltage input (destruction
limit)
Characteristic linearization
Temperature compensation
•
Internal temperature
compensation
•
External temperature
compensation with
Pt 100
•
Compensation for 0°C
comparison point
temperature
•
Compensation for 50°C
comparison point
temperature
•
Technical unit for
temperature
measurement
Programmable Logic Controllers S7-300 Module Data
Type B, C, N, E, R, S, J, L,
T, K, U
20 VDC continuous; 75
VDC for max. 1 s (duty
factor 1:20)
Programmable
Programmable
Possible
Possible
Possible
Possible
Degrees Celsius/
degrees Fahrenheit
A5E00105505-03
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