Analog Input Module AI 8xU/R/RTD/TC HF (6ES7531-7PF00-0AB0)
56 Manual, 09/2016, A5E36647959-AB
Parameter assignment and structure of the parameter data records
The data records of the module have an identical structure, regardless of whether you
configure the module with PROFIBUS DP or PROFINET IO.
Dependencies for configuration with GSD file
When configuring the module with a GSD file, remember that the settings of some
parameters are dependent on each other. The parameters are only checked for plausibility
by the module after the transfer to the module.
The following table lists the parameters that depend on one another.
Table B- 1 Dependencies of parameters for configuration with GSD file
Device-specific parameters (GSD file)
Resistance, Resistance Thermometer RTD,
Only for measuring type thermocouple TC.
Resistance measurement type (4-wire connec-
Only for measuring range 150 Ω, 300 Ω, 600 Ω and 6000 Ω.
Hardware interrupt limits
Only if hardware interrupts are enabled.
Fixed reference temperature
Fixed reference temperature
is configured at parameter
Reference junction for TC.
Temperature unit Kelvin (K)
Only for measuring type thermistor RTD and for thermocouple TC.
Parameter assignment in the user program
The module parameters can be assigned in RUN (for example, measuring ranges of
selected channels can be edited in RUN without having an effect on the other channels).
Parameter assignment in RUN
The WRREC instruction is used to transfer the parameters via data records 0 to 8. The
parameters set in STEP 7 do not change in the CPU, which means the parameters set in
STEP 7 are still valid after a restart.
The parameters are only checked for plausibility by the module after the transfer to the
module.
The module ignores errors that occurred during the transfer of parameters with the WRREC
instruction and continues operation with the previous parameter assignment. However, a
corresponding error code is written to the STATUS output parameter.
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