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9. READINGIWRITING IN DATA THE PLC CPU EXCHANGE MELSEC-A 9.2 List of E71 Commands and Functions This section explains the commands and functions usedto read and write data in the PLC CPU from remote nodes. Command Res m s e Tvoes Number of Processes PerformedFor 1 Ex- Descriptionof Processing I Functions change IBatch read IBatch write Test (Random Device mmo,4 write) Monitor data registration Monitor ExtensionMe reg- ister Word unit 07H Bit unit Word unit 08H 09H Batch read Batch write 18H Test (Random write) 19H Monitor data registration 1AH Monitor 1 BH Dtrect read 3BH Direct write 3CH Special function Batch read Batch write Module OEH I I OFH units. Word devices that monitor (D, R, T, C, etc.) are registered in 1 20 Points polnt unit. Device monitorsf& which monitor data registration wascon- (Number of registrations ducted. portion) (R) are readin 1 point unit. 17H 256 Polnts Extension file registers Extensionfile registers(R) are written in 1 point unit. 256 Points Extension file registers(R) are witten in 1 point unit and the Mock 40 Points No. and device No. are randomly set. The extension file registers that monitor (R) are registered in 1 20 Points pant unit Monitors the extension file registers (R) that conduct the monitor data registration. Reads in 1 point unit the extension file registers(R) that are di256 Polnts rectly set. Reads in 1 point unlt the extension file registers (R) that are di256 Points rectly set. Reads the m t e n t s of the special M i o r , module buffermemory. ] 256 Bytes(l28 Words) I Writesthedata to thespectalfunction module buffermemory. I 256 Bytes(l28 Words) I I I 9-12
