Parameter Data Records; Parameter Assignment And Structure Of The Parameter Data Records - Siemens SIMATIC S7-1500 Manual

Parameter data records

B.1

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)
Current limit for wire break
Wire break
Common mode error
Reference channel error
Measuring type resistance (4-wire connection,
3-wire connection)
Measuring type resistance (4-wire connection,
3-wire connection, 2-wire connection)
Measuring type thermal resistor RTD (4-wire
connection, 3-wire connection)
Hardware interrupt limits
Fixed reference temperature
Temperature unit Kelvin (K)
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
Instruction WRREC is used to transfer the parameters by means of data records 0 to 7 and
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.
51
Dependent parameters
Only for measuring type current with measuring range 4 mA to 20 mA.
Only for measuring type resistance, thermal resistor RTD, thermocouple
TC, voltage with measuring range 1V to 5 V and current with measuring
range 4 mA to 20 mA.
Only for measuring type voltage, current and thermocouple TC.
Only for measuring type thermocouple TC.
Only for measuring range 150 Ω, 300 Ω, 600 Ω and 6000 Ω.
Configurable for even channels (0, 2, 4 and 6) only.
The following odd channel (1, 3, 5, 7) must be deactivated.
Only if hardware interrupts are enabled.
Only if the value Fixed reference temperature is configured at parameter
Reference junction for TC.
Only for measuring type thermal resistor RTD and for thermocouple TC.
Analog input module AI 8xU/I/RTD/TC ST (6ES7531-7KF00-0AB0)
B
Manual, 09/2016, A5E03484864-AD