Control Word Profile; Change Of State, Cos - Danfoss VLT AutomationDrive Manual

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VLT AutomationDrive EtherNet/IP

Control Word Profile

The Control profile is selectable in par. 8-10 Control Word Profile.
- ODVA, gives access to the ODVA specific profiles and assembly instances: 20, 21, 70 and 71.
- FC, enables the Danfoss profile and assembly instances: 100, 101, 103, 150, 151 and 153.
For more information on the different profiles, please refer to the subsequent sections.
N.B.: Change of control profile.
It is only possible to change Controlword profile while the drive is stopped.
Control word and reference will not be recalculated to match the selected profile, but are kept
at the last good known value.

Change of State, COS

This event controlled operation mode used to minimize network traffic.
Messages are only transmitted if a defined state or value has changed. The condition for triggering
COS message, is determined by the inserting of COS-filters (par. 12-21 to 12-21), for each bit in the
different PCD-words.
The filter acts like a logical AND-function: If a bit in the filter is set to "1", the COS-function triggers
upon a change to the corresponding bit for the PCD-word.
Parameter 12-38 can be used to filter out undesired events for COS. If a filter bit is set to 0, the
corresponding I/0 Instance bit will be unable to produce a COS message.
By default, all bits in the COS filters are set to 0.
In order to signal that the connection has not been interrupted, or the device is not powered off, a
Heartbeat Message is transmitted within a specified time interval (Heartbeat Interval). This interval is
defined in Attribute Heartbeat Time of the connection object, Class 0x01.
To prevent the device from producing heavy network traffic if a value changes frequently, the
Production Inhibit Time in par. 12-37 is defined. This parameter defines the minimum time between
two COS messages.
If par. 13-37 is set to 0, the Production Inhibit Timer is disabled.
The figure below shows the different PCD's and their corresponding filter parameters.
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MG.90.Jx.02 ver. 5 September 2007 – VLT is a registered Danfoss trademark
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