eWON General Reference Guide - Esco Drives & Automation

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General Reference GuideIO Servers ConfigurationImportant: When there are multiple IO servers potentially using the serial line, the unused IO servers must be "DISABLED" for theunused IO server baudrate.Example: if Modbus and UniTE IO servers are available, at least one of them must have the baudrate configured to "Disabled". Ifnot, one of the IO servers will not be able to use the serial line and it will be disabled, with an error written in the event log.5.5.2.2 Topic configurationFigure 80: XWAY-UNITELWAY topics configurationThree topics can be used for the IO Server. These topics are used to give a common property to a group of UNITE Tags such as:• Enable/Disable• Poll rate• Global Slave addressTopic configuration itemTopic enabledGlobal Slave AddressPoll rateDescriptionEnables or disables polling of all the Tags in the topic.This Slave address is a global parameter for all the Tags of the topic. See below for the DeviceAddress syntax. If an address is specified here, it will replace (overload) the address defined Tag byTag.Defines the refresh rate of the Tag name. In a complex application, we can imagine that some Tagname must be refreshed every second – typically for digital input - and other every minute – typically:temperature-.Table 69: UNITE - topics configuration5.5.3 Tag name conventionIO Server configurationIO Server NameUNITEATopic NameBItem NameCValueName,Network,Station,Gate,Module,ChannelValueName,Network,Station,GateValueNamePLC Address is defined Tag by Tag (and the gate requires a5 level addressing)PLC Address is defined Tag by TagTopic PLC Address is usedTable 70: UNITE - IO server configurationThe Item Name can contain the PLC address where the value is polled, or not. If the address is also specified at topic level, the address specifiedat Tag level will be ignored. If the Topic address is not defined either, then address 0,254,0 will be used.RG-001-0-EN ver 1.5 eWON® - 20/03/2009 - ©ACT'L sa Page 97
General Reference GuideIO Servers Configuration5.5.3.1 Value NameValue name follows the syntax below:MWxWMWxIInternal data word 16 bits (unsigned)Internal data word 16 bits (signed)MWxD Internal data word 32 bits as DWORD (unsigned) (*)MWxFInternal data word 32 bits as IEEE floatMWxL Internal data word 32 bits as LONG (signed) (*)SWxWSWxISystem data word 16 bits (unsigned)System data word 16 bits (signed)SWxD System data word 32 bits as DWORD (unsigned) (*)SWxL System data word 32 bits as LONG (signed) (*)MxSxInternal data bitSystem data bitTable 71: value names for UNITE addresses(*) Important: See “Tags are stored as Float” on page 67Notes:SW type cannot be formatted as floatThe eWON allows you to optimize the requests in case you need to read a lot of Tags that have been created on the UniTelWaydevice. Imagine you have 100 Tags to read, the eWon will group the Tags within a predefined limit in order to make the less asreading operations as possible. The number of Tags that can be read depends of the types of words or bits that have to be read:SW and MW types: by groups of 50S and M types: by groups of 200It is possible to read one bit from a word. The syntax to add is as follows:#0 to #31That means that if you want to read the fourth bit from an internal data word 16 bits unsigned that you address MW0, you have to add"#4" at the end of the address: MW0#4.The type of words for which this syntax can be applied are:MWxW, MWxI, MWxD, MWxL, SWxW, SWxI, SWxD and SWxL (please report to the table above).• Status register:The STATUS Tag is a special Tag that returns information about the current state of the communication for a given device. As for other Tags, thestatus Tag ValueName is composed of:Status, Global Device Address• You can define a status Tag for each PLC used.• If you use the status address, the Tag must be configured as analog.0Communication not initialized. Status UNKNOWN.If no Tag is polled on that device address, the communication status is unknown.1 Communication OK.2 Communication NOT OK.Table 72: Tag Status meaningRG-001-0-EN ver 1.5 eWON® - 20/03/2009 - ©ACT'L sa Page 98
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