Danfoss VLT PROFIBUS DP MCA 101 User Manual

5.3.5 Example
This example shows
•
How to use PPO type 1 to change the ramp-up
time to 10 s in parameter 3-41 Ramp 1 Ramp Up
Time.
•
How to command a start and speed reference of
50%.
Frequency converter parameter settings:
•
Parameter 8-50 Coasting Select: [1] Bus.
Parameter 8-10 Control Word Prole: [1] PROFIdrive
prole.
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 Conguration. 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 prole:
Control words consist of 16 bits. The meaning of each bit
is explained in chapter 4.4.1 Control Word According to
PROFIdrive Prole (CTW) and chapter 4.4.2 Status Word
According to PROFIdrive Prole (STW). The following bit
pattern sets all necessary start commands:
0000 0100 0111 1111=047F hex.
1)
0000 0100 0111 1110=047E hex.
1)
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.
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.
Parameter Access Programming Guide
MG37G202 Danfoss A/S © 01/2016 All rights reserved. 33
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Danfoss VLT PROFIBUS DP MCA 101 Specifications

General

Brand	Danfoss
Model	VLT PROFIBUS DP MCA 101
Category	Media Converter
Language	English