Vacon 100 INDUSTRIAL, Руководство пользователя

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Communications vacon • 41
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6
6.4 Modbus TCP/UDP communication and connection timeout
It is possible to open up to three Modbus TCP/UDP connections to the VACON
®
100 family AC drive.
One of the connections could be used for process data and other just for reading monitoring data.
In most cases it is desirable that if "monitor" connection gets disconnected, no fault is generated
but when the connection is handling the process data, a fault should be generated in the time
specified.
This register address enables the user to give custom communication timeout for each connection.
If a custom timeout value is used, it must be given every time a connection is opened. Timeout can
be set only to the connection which is been used to access this register. By default the connection
uses the communication timeout value given via panel parameters.
If the cable is disconnected, a fieldbus fault is activated after the timeout period. When
communication timeout is zero, no fault is activated.
In Modbus RTU you can only have one connection, so there is no need to use this value.
Figure 8. The Modbus TCP/UDP function in case of timeout
Table 35. Communication timeout register
Holding
register
address Purpose Description
40501
Communication
timeout
Connection timeout value for this
connection in seconds.
Communicating
Received packet during
communication
timout time?
Timeout
Check Yes
Yes
Closed
Yes
No
No
No
Broken
Communication timeout zero?
Connection closed or broken?
FAULT! No fault
Has second connection with
communication timeout
other than zero?
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