Declaration Of Parameters - Siemens SIMATIC S7-1500 Manual

4.3

Declaration of parameters

No supply voltage L+
Enabling of the diagnostics, with missing or too little supply voltage L+.
Overflow
Enabling of the diagnostics if the measured value violates the high limit.
Underflow
Enabling of the diagnostics when the measured value falls below the underrange or for
voltage measurement ranges of ± 50 mV to ± 2.5 V if the inputs are not connected.
Common mode error
Enabling of diagnostics if the valid common mode voltage is exceeded.
Enable the Common mode error diagnostics when 2WMT is connected, for example, to
check for a short circuit to ground
error diagnostics, disable the parameter.
Reference junction
Enabling of the diagnostics reference junction when the TC channel has no reference
temperature or incorrect reference temperature.
Wire break
Enabling of the diagnostics if the module has no current flow or the current is too weak for
the measurement at the corresponding configured input or the applied voltage is too low.
Current limit for wire break diagnostics
Threshold for reporting wire breaks. The value can be set to 1.185 mA or 3.6 mA, depending
on the sensor used.
Temperature coefficient
The temperature coefficient depends on the chemical composition of the material. In Europe,
only one value is used per sensor type (default value).
The temperature coefficient (α value) indicates by how much the resistance of a specific
material changes relatively if the temperature increases by 1 °C.
The further values facilitate a sensor-specific setting of the temperature coefficient and
enhance accuracy.
Analog Input Module AI 4xU/I/RTD/TC ST (6ES7531-7QD00-0AB0)
Manual, 09/2016, A5E32366209-AC
or a wire break. If you do not need the Common mode
ANA
Parameters/address space
4.3 Declaration of parameters
29