13.2.1
A parameter is accessed by its parameter number and data set number. The valid
range for parameter number is 0 ... 1599, the range of data set number is 0 ... 9.
Note: For the handling of data set selection see chapter "13.1.4 "Parameters, data
The standard mode uses the direct setting of Profibus node ID,
the setting of the two 8 bit objects
and data set number for read/write is done. The number of bytes to be transferred
(read/write) depends on the parameter's data type. In the case of a write cycle and
an invalid number of bytes the CM-PDPV1 protocol reacts with an error message.
Calculation of slot and index:
Calculate an application data index ADI as a 16 bit unsigned integer with
Calculate the value of
Example:
The parameter data structure is explained above.
Access to Systembus:
The Standard Mode also offers a special functionality to obtain access to additional
inverters via the Systembus. For example, there exists one inverter with CM-PDPV1
and several additional inverters coupled to the first one via the Systembus.
This function can be implemented with CM-PDPV1 via the virtual parameter 1600.
After power on/reset this virtual parameter 1600 is set to zero. With 1600 = 0 all
parameter accesses by V1 channel are allocated to the inverter with CM-PDPV1 itself.
28
28
Standard Mode
set selection and cyclic writing".
ADI = (parameter number + 1) + (2000 * (data set number + 1))
slot
index
and
slot
= (ADI – 1) / 255
index = (ADI – 1) modulo 255
parameter number
data set number
ADI
= (480 + 1) + (2000 * (3 + 1)) = 8481
slot
= (8481 - 1) / 255
index
= (8481 - 1) modulo 255
CM-PDPV1
CM-PDPV1
slot
index
and
the selection of parameter number
with
= 480
= 3
= 33
= 65
slot
index
and
. With
08/08
08/08
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