Siemens SIMATIC S7-1500 Manual page 56

Parameter data records
B.1 Parameter assignment and structure of the parameter data records
Codes for measurement types
The following table lists all measurement types of the analog input module along with their
codes. Enter these codes at byte 2 of the data record for the corresponding channel (see the
figure Structure of data record 0: Bytes 7 to 27).
Table B- 2
Measurement type
Deactivated
Voltage
Current, 2-wire transmitter
Current, 4-wire transmitter
Resistance, 4-wire connection *) **)
Resistance, 3-wire connection *) **)
Resistance, 2-wire connection *) ***)
Thermal resistor linear, 4-wire connection *)
Thermal resistor linear, 3-wire connection *)
Thermocouple
*) only possible for channels 0, 2, 4 and 6
**) only for the following measuring ranges: 150 Ω, 300 Ω, 600 Ω, 6 kΩ
***) only for measuring range PTC
Special feature for configuration
If you configure one of the following measuring types at one of the channels 0, 2, 4 and 6:
● Resistance, 4-wire connection
● Resistance, 3-wire connection
● Resistance, 2-wire connection
● Thermal resistor linear, 4-wire connection
● Thermal resistor linear, 3-wire connection
then one of the following channels must be disabled.
Example:
You have configured "Resistance, 4-wire connection" at channel 0; channel 1 must be
disabled. You have configured "Resistance, 2-wire connection" at channel 2; channel 3 must
be disabled.
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Code for the measurement type
Code
0000 0000
0000 0001
0000 0011
0000 0010
0000 0100
0000 0101
0000 0110
0000 0111
0000 1000
0000 1010
Analog input module AI 8xU/I/RTD/TC ST (6ES7531-7KF00-0AB0)
Manual, 09/2016, A5E03484864-AD