Profibus Dp Parameter And Data Type - Danfoss VLT Midi Drive FC 280 Programming Manual

Parameter Access
Frequency converter parameter settings:
•
Parameter 8-50 Coasting Select: [1] Bus.
Parameter 8-10 Control Word Profile: [1] PROFIdrive
profile.
5.3.5.1 PCV
PCA parameter characteristics
PCA part (byte 1–2).
The RC part tells what the PCV part must be used for. The
functions available are listed in chapter 5.3.1 PCA Handling.
When a parameter is changed, select value 2 or 3. In this
example, 3 is selected because parameter 3-41 Ramp 1
Ramp Up Time covers a long word (32 bits).
Parameter 3-41 Ramp 1 Ramp Up Time = 155 hex: In this
example, bytes 1 and 2 are set to 3155. See the values for
bytes 1 and 2 in chapter 5.3.5 Example.
IND (bytes 3–4)
Used when reading/changing parameters with subindex,
for example parameter 9-15 PCD Write Configuration. In the
example, bytes 3 and 4 are set to 00 hex. See the values
for bytes 3 and 4 in chapter 5.3.5 Example.
PVA (bytes 5–8)
Change the data value of parameter 3-41 Ramp 1 Ramp Up
Time to 10.00 s. The value transmitted must be 1000,
because the conversion index for parameter 3-41 Ramp 1
Ramp Up Time is 2. Therefore, the value received by the
frequency converter is divided by 100, such that the
frequency converter perceives 1000 as 10.00. Bytes 5–8 =
1000 = 03E8 hex. See chapter 5.4 PROFIBUS DP Parameter
and Data Type. See the values for bytes 5–8 in
chapter 5.3.5 Example.
5.3.5.2 PCD
Control word (CTW) according to PROFIdrive profile:
Control words consist of 16 bits. The meaning of each bit
is explained in and chapter 4.4.2 Status Word According to
PROFIdrive Profile (STW). The following bit pattern sets all
necessary start commands:
0000 0100 0111 1111 = 047F hex.
0000 0100 0111 1110 = 047E hex.
0000 0100 0111 1111 = 047F hex.
1) For restart after power-up:
•
Set bits 1 and 2 of the CTW to 1.
•
Toggle bit 0 0–1.
These values are for bytes 9 and 10 in
chapter 5.3.5 Example.
Quick stop: 0000 0100 0110 1111 = 046F hex.
Stop: 0000 0100 0011 1111 = 043F hex.
MG07F102
Programming Guide
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5.4 PROFIBUS DP Parameter and Data Type

5.4.1 Parameter Description
PROFIBUS DP has a number of description attributes. Read/
write on parameter description is performed in the PCV
part using the RC commands 4 and 5, and the subindex of
the wanted description element.
5.4.2 Size Attribute
Find the size index and the conversion index for each
parameter from the parameter list in the respective
operating instructions. See also size and conversion indices
in Table 5.18.
5 5
31