Operating instructions

The figure below shows the different PCDs and their corresponding filter parameters.

Par. 10-20 to 10-23 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 in-

terval is defined in Attribute Heartbeat Time of the connection object, Class Code 0x05.

To prevent the device from producing heavy network traffic if a value changes frequently, the

Production Inhibit Time (an attribute of the connection object) is defined. This parameter defines

the minimum time between two COS messages.

The Attribute Expected Package Rate defines the maximum time between two COS messages even

when the value is unchanged. In the event of COS connection, the Explicit Package Rate is identical

with the Heartbeat Interval mentioned above. This timer is used both as transmission trigger and

inactivity watchdog, depending upon whether the connection is producer or consumer.

4. How to Control the Frequency Converter FC 100/ 200/ 300 DeviceNet

MG.33.D3.02 - VLT

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