Daikin MicroTech III Installation And Maintenance Manual

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Daikin MicroTech III Installation And Maintenance Manual Manual pdf 11 page image

neTwork ConfIguraTIonwww.DaikinApplied.com 11 IM 969-5 • MICROTECH III CHILLER UNIT CONTROLLERConfigurable ParametersTable 3 defines the network parameters of theModbus communication module that are availableon the Main Menu_View/Set Unit_Modbus Setupmenu of the unit controller keypad/display. Change parametersas required for your network.Table 3: Network ParametersParameter Range/Default Description/NotesApply Changes Yes or NoDefault: NoSetting this to Yes cycles power to the unit controller, thus allowing the network setup changes to takeplace.Network Address1,2 1-247Default: 1The Modbus Address of the communication module. This must be unique throughout the entirenetwork.Baud Rate1,2 4800, 9600, 19200, 38400Default: 38400 Data transfer speed (bps) of the Modbus network.Parity1Even = 0Odd = 1None = 2Defaut: NoneDefines the parity (i.e. the use of checksums for detecting transmission errors) that is specified for thebus. This must also be identical for all nodes on the bus.Two Stop Bits1 Yes or NoDefault: YesThis defines the number of stop bits. Yes = 2 stop bits, No = 1 stop bit. Two stop bits are used unlessthis parameter is set to No. This value must also be coordinated with the other bus nodes.Load Resistor Yes or NoDefault: NoSet this parameter to Yes if this unit is the first or last slave on the segment. If an external terminatingresistor is used, set this parameter to No.Response Delay1 0 - 30000 millisecondsDefault: 5 millisecondsWhen a request is received, the response is delayed by this many milliseconds to avoid over-run ofthe master device. In most cases, it is not necessary to change this delay. However, Response Delaycan be adjusted if the master is too slow.Com LED Timeout 0 - 3600 secondsDefault: 3 secondsIf the Com LED Timeout is set to 0, the BUS LED is always green and cannot be used to indicatecommunication to the master. If the master does not poll within this time, then the BUS LED turns red.Modbus BSP 9.18 or newer Board Support Package - indicates the Modbus communication module firmware version. TheModbus BSP is read-only.Unit Support English or MetricDefault: English Controls the type of units that are passed through Modbus.1. Parameter must be configured via the unit controller keypad/display.2. Boldface indicates that the parameter is required for minimum network configuration.NOTE: If the unit controller application software requires a field upgrade, the network configuration parametersrevert to their default values. Please contact the Chiller Technical Response Center at 540-248-9239(techresponse@daikinapplied.com) for assistance.

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