
Analog modules
5.23 Analog input module SM 431; AI 16 x 16 Bit (6ES7431-7QH00-0AB0)
S7-400 Automation System Module Data
Reference Manual, Edition 09/2009, A5E00850736-06
309
Selected measuring method Measuring range
(type of sensor)
Measuring range module
settings
Description
TC-L: Thermocouple (linear)
(Temperature measurement)
Type B
Type N
Type E
Type R
Type S
Type J
Type L
Type T
Type K
Type U
A The digitized analog values
are listed in the section
"Representation of analog
values for analog input
channels" in the temperature
range.
RTD-3L: Thermal resistance
(linear, 3-conductor
connection) (temperature
measurement)
RTD-4L: Thermal resistance
(linear, 4-conductor
connection) (temperature
measurement)
Pt 100 Climatic
Pt 200 Climatic
Pt 500 Climatic
Pt 1000 Climatic
Ni 100 Climatic
Ni 1000 Climatic
Pt 100 Standard
Pt 200 Standard
Pt 500 Standard
Pt 1000 Standard
Ni 100 Standard
Ni 1000 Standard
A The digitized analog values
are listed in the section
"Representation of analog
values for analog input
channels" in the temperature
range.
Default
The "voltage" measuring method and "± 10 V" measuring range are set by default in
STEP 7. You can use this combination of measuring method and measuring range without
configuring the SM 431; AI 16 x 16 Bit in STEP 7.
Wire break monitoring
The wire break check is intended primarily for temperature measurements (TC, RTD) or
resistance measurements. Always configure the wire break check in these cases as this
ensures that in the event of a wire break the measured value provided by the module
accepts the data for overrun 7FFFH.
Special characteristics of the wire break check for the voltage measurement methods
In some transducers, incorrect measured values may occur due to the fact that the wire
break check is enabled. If so, disable the wire break check.
Reason: Some transducers try to correct the test current and in doing so corrupt the setpoint
value they provide.
Points to note about the wire break check when current sensors are connected
A wire break check of current sensors is not possible for the SM 431; AI 16 x 16 Bit except in
life-zero areas. You can therefore only configure the wire break check for the "Current (4-
wire transducer)" measuring method and the "4 to 20 mA" measuring range.
Kommentare zu diesen Handbüchern