Pcv Parameter Access - Danfoss VLT Midi Drive FC 280 Programming Manual

Parameter Access
5.2.20 Supported Data Types
Value Data type
2 Integer8
3 Integer16
4 Integer32
5 Unsigned8
6 Unsigned16
7 Unsigned32
9 Visible string
10 Octet string (byte string)
33 N2 (standardized value)
35 V2 (bit sequence)
44 Error
54 Time difference without date indication
Table 5.12 Supported Data Types
5.2.21 Value
The value field contains the parameter value of the
request. When the response is negative, the field contains
a corresponding fault code. If the values consist of an odd
number of bytes, a 0-byte is appended to maintain the
word structure of the telegrams.
For a positive partial response, the parameter value field
contains the following attributes:
•
Format = Data type or byte, word, double word.
•
Number of values = Actual number of values.
•
Value = Parameter value.
For a negative partial response, the parameter value field
contains the following:
•
Format = Error (44H).
•
Number of values = 1.
•
Value = Error value = Error number.
5.2.22 Fault Codes for Drive Profile V 3.0
When the parameter request is invalid, the frequency
converter returns a corresponding fault code. Table 5.13
lists the full range of fault codes.
Fault Description
code
0x00 Unknown parameter.
0x01 Parameter is read-only.
0x02 Value out of range due to maximum/
minimum value.
0x03 Wrong subindex.
0x04 Parameter is no array.
0x05 Wrong data type (wrong data length).
0x06 This parameter may not be set, only reset.
MG07F102
Programming Guide
Fault
code
0x07
0x09
0x0b
0x0f
0x11
0x14
0x15
0x16
0x17
0x18
0x65
0x66
0x67
0x68
Table 5.13 Fault Codes for DP-V1 Parameter Requests

5.3 PCV Parameter Access

The PROFINET cyclic data exchange performs parameter
access via the PCV channel. The PCV channel forms part of
the PPOs described in chapter 4 Control.
Use the PCV channel to read and write parameter values,
and read status for descriptive attributes of each
parameter.
5.3.1 PCA Handling
The PCA part of PPO types 1, 2, and 5 performs several
tasks. Using PCA, the master controls and supervises
parameters and requests a response from the slave. Then
the slave responds to a request from the master. Requests
and responses are a handshake procedure and cannot be
batched. Therefore, when the master sends out a read/
write request, it must wait for the response before it sends
a new request. The request or response data value is
limited to maximum 4 bytes (see RC characteristics in
More Info
Table 5.14), which implies that text strings are not
transferable. For further information, see
0
chapter 7 Application Examples.
Subindex
Subindex
5.3.2 PCA - Parameter Characteristics
Subindex
15 14 13 12
0
RC
0
Subindex
Table 5.14 PCA - Parameter Characteristics
Danfoss A/S © 05/2016 All rights reserved.
Description
Descriptive element is read-only.
No description available (only value).
Process control not possible.
No text array available (only value).
Not possible in current state.
Value out of range due to frequency
converter state/configuration.
Reply too long (more than 240 bytes).
Wrong parameter address (unknown or
unsupported value for attribute, element,
parameter number, or subindex, or illegal
combination).
Illegal format (for writing).
Value amount not consistent.
Wrong axis: Action not possible with this
axis.
Unknown service request.
This service is not possible with multi-
parameter access.
Parameter value cannot be read from bus.
11 10 9 8 7 6
SMP
More Info
Subindex
0
0
0
0
Subindex
0
0
5
0
0
–
–
–
–
5 4 3 2 1 0
PNU
29
5