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PROFINET IO protocol
Sub-
Field name
index
8
High limit
9
Reserved
10
ID extension
Normalisation
11
reference parameter
12
Normalisation field
5.4.5.1
Parameter requests
There are two types of parameter requests in PROFIdrive:
• Read requests for reading parameters from the device
• Change requests for writing parameters to the device
Each parameter request consists of three elements:
• Request header
• Parameter address
• Parameter value (only in Change requests)
Request header
5.4.5.2
Request header
The request header consists of 4 fields, each one octet in size.
Octet
Field name
number
Request Refer-
1
ence
2
Request ID
3
Axis Number
Requested num-
4
ber of
parameters
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
Data type
Array of four
Unsigned8
Array of two
Unsigned8
Unsigned16
Unsigned16
Unsigned16
Parameter
address(es)
Table 31.
Request header
Description
Unique number for each
request/response pair. This
value is changed by the
master for each new
request. It is mirrored by the
slave in the response.
Defines the type of request.
Not used, should be set to 1. Use 1 for VACON
The number of parameters
affected by the request.
Limit for valid values of the parameter.
Reserved, always 0.
Not used, always 0.
Parameter number, the value of which
is used as normalisation reference for
the parameter whose description this
is.
Contains information about normalisa-
tion of this parameter.
Parameter value(s)
Allowed values
A bitmask with information about the
parameter characteristics.
Use 0x01 for Read requests.
Use 0x02 for Change requests.
Other values are not allowed.
Other values should not be used.
Values 1 to 39 are allowed.
The value 0 is not allowed.
Values 40 to 255 are not allowed.
vacon • 33
Description
®
100 PROFINET IO.
5
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