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E - VAE ProSys sro

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6.1.4 Address declaration Modbus-Master in PLCPlus-GFor a simplification of the ABB AC31 addressing via the Modbus Protocol a special routine was developed, thismake a direct parameterizing of the variables possible.Now it is also possible to operate variables in several AC31 / KP93 slaves.Pay attention to the following notes:• MT and Slaves must have a RS-485 or RS 422 interface• the Slaves must have different Modbus addresses [1...31]• the preset of the Modbus address has to be done via the station number of the terminal (Text terminals withDIL, Graphic terminals with configuration menu).• the address sections of the Basic definitions can always be assigned for one slave, that means that all Faultbits are coming from one slave etc...• the variables within the texts can come from any terminal• Choose the general PLC-Mode in PLCPlusFollowing parameters are allowed:Format Telegram type Address AC31 Address section Modbus-BasicaddresshexMW Word flags Register (XXMWggg,kk), (MW00,00)...(MW255,15) 2000(MWggg,kk)MD Double word Register (XXMDggg,kk), (MD00,00)...(MD31,15) 4000flags(MDggg,kk)KW WordRegister (XXKWggg,kk), (KW00.00)...(KW39,15) 3000constants(KWggg,kk)KD Double word Register (XXKDggg,kk), (KD00,00)...(KD07,15) 5000constants(KDgg,kk)M Binary flags Binary Data (XXMggg,kk), (M00,00)...(M255,15) 2000(Mggg,kk)* no write accessXX Station number 0...31ggg Group number 0...255 (length depends on the format)kk Channel number 0...15If no station number was defined, those AC31 will be addressed, witch Modbus address corresponds with thepreset station number of the terminal. (Text terminals with DIL, Graphic terminals with the configuration menu).Example for Basic definitions:PLC address 'function key field:PLC address of control words:Address of message data words:(3MW00,00)(3MW00,10)(3MW01,14)Examples for text addressing:(3MW10,02)UUUU (4M10,02)B (MW10,02)UUUUSlave 3 Slave 4 Slave of DIL-/ configuration addressNote for Modbus Master:Communication is faster if a space of (5 + number of fault words) registers between "PLC address of controlwords" and "Address of message data words" is selected.Process display and control/ Device Manual/ Issue: 07.0197E

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