NORD Drivesystems BU0940 - Manual (Page 34)

S7 standard modules – Supplementary manual options for NORD - Frequency Inverters
34 BU 0940 GB-3612
4. Parameter modules
The parameter modules are used to read out parameter values from the frequency inverters or to write
values into them. All modules access the parameters in reading mode.
For acyclic reading and writing, access to the memory addresses (PKW channel) of the frequency
inverter is not via the peripheral addresses but rather via the diagnostic address. This is explicitly
specified in the dialogue during the hardware configuration. Access to the addresses is performed with
standard Siemens function modules, which are available in the library of the Simatic Manager.
Therefore access to the parameters no longer depends on the PPO type. With PROFIBUS, access to
the parameters is only possible for Profibus slaves of type DPV1 and for PROFINET IO devices.
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4.1 Purpose of the parameter modules
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4.1.1 Purpose of parameter modules for cyclic data communication
The function modules "Para_PPO1+…" are called up in the cyclic section of the program. In addition
to the parameter modules, the associated instance modules "Inst_PPO1+..." are also required.
Example:
Function module: Para_PPO1+2R
Instance data module: Inst_PPO1+2R
Purpose:
The function module "Para_PPO+..." is used to read a specific parameter via statement of the
parameter number and index or to write this into the frequency inverter. In addition, parameters which
provide a setting facility which depends on the parameter set can also be accessed. Please refer to
the manual for the relevant frequency inverter for information regarding which parameters can be read
or written with index and/or depending on the parameter set.
Parameter
variants
Example Parameter
number
Index Parameter set Meaning
Standard
parameter P300 300 - - Servo mode
Parameter Index P475 [-02] 475 02 - ON/OFF switching delay, digital
input 2
Parameter set-
dependant
parameter P102
(P1
… P4)
102 - 1, 2, 3 or 4 Run-up time for parameter set 1
(or 2, 3 or 4)
Parameter set-
dependant index
parameter P525 [-02]
(P1
… P4)
525 02 1, 2, 3 or 4 Load monitoring auxiliary value
2 for parameter set 1 (or 2, 3 or
4)
Table 6: Example of parameter types