Siemens SIMATIC ET 200eco PN Operating Instructions Manual page 157

11.1.3 Parameter description analog input
Group diagnostics
You can generally enable and disable the diagnostics function of the device with this
parameter.
The "Fault" and "Parameter assignment error" diagnostics functions are always independent
of the group diagnostics.
Diagnostics, missing 1L+
If you enable this parameter, the check for missing supply voltage is enabled.
Diagnostics, sensor supply short circuit
If you enable this parameter, a diagnostics event is generated if a short-circuit of the sensor
supply to ground is detected and the channel is enabled. The sensor supply is monitored for
connectors X1, X3, X5, and X7. It is not possible to differentiate which connector has
experienced the sensor short circuit.
Interference frequency suppression
With this parameter, you set the integration time of the device, based on the selected
interference frequency. Select the frequency of the supply voltage used. Interference
frequency suppression Off means 500 Hz, which corresponds to an integration time of 2 ms
for a measurement channel.
Temperature unit
Specify the unit of the temperature measurement here.
Measurement type (channel-wise)
With this parameter, you set the measurement type, for example, voltage. For any unused
channels, you must select the disabled setting. For a disabled channel, the conversion time
and integration time of the channel = 0 s, and the cycle time is optimized.
Measuring range
With this parameter, you set the measuring range of the selected measurement type.
Temperature coefficient (for RTD, thermoresistor)
The correction factor for the temperature coefficients (α-value) indicates by what extent the
resistance of specific material changes relatively if the temperature is increased from 0°C to
100°C.
The α-values conform to EN 60751, GOST 6651, JIS C 1604, and ASTM E-1137.
The temperature coefficient depends on the chemical composition of the material.
ET 200eco PN
Operating Instructions, 06/2009, A5E01250250-04
I/O device analog input/output
11.1 I/O device analog input
157