Vacon 100 Industrial User Manual

Also see for 100 flow: Applications manual Installation instruction Installation manual Installation manual Installation manual

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Vacon 100 Industrial User Manual Manual pdf 43 page image

Communications vacon • 41Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/66.4 Modbus TCP/UDP communication and connection timeoutIt 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 generatedbut when the connection is handling the process data, a fault should be generated in the timespecified.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 canbe set only to the connection which is been used to access this register. By default the connectionuses the communication timeout value given via panel parameters.If the cable is disconnected, a fieldbus fault is activated after the timeout period. Whencommunication 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 timeoutTable 35. Communication timeout registerHoldingregisteraddressPurpose Description40501 CommunicationtimeoutConnection timeout value for thisconnection in seconds.CommunicatingReceived packet duringcommunicationtimout time?TimeoutCheckYesYesClosedYesNoNoNoBrokenCommunication timeout zero?Connection closed or broken?FAULT! No faultHas second connection withcommunication timeoutother than zero?7092_uk