WAGO-I/O-SYSTEM 750 Fieldbus Communication 167750-843 ETHERNET Controller 10 MBitManualVersion 1.2.0The digital MODBUS services (coil services) are bit accesses, with which onlythe states of digital I/O modules can be determined or changed. Complex I/Omodules are not attainable with these services and so they are ignored. Because ofthis the addressing of the digital channels begins again with 0, so that theMODBUS address is always identical to the channel number, (i.e. the digital inputno. 47 has the MODBUS address "46").Pos : 98.21 /Alle Serien (Allgemeine D okumente) (Allgemeine M odul e)/F eldbus kommuni kati on/MOD BUS/MOD BUS-R egister-M apping - Bitz ugriff Les en ( mit FC 1, FC2) (C ontroll er, x42) @ 4\mod_1236078194656_21.doc x @ 27977 @ @ 1Bit Access Reading (with FC1 and FC2)Table 99: Bit access reading (with FC1 and FC2)MODBUS address Memory range Description[dec] [hex]0...511 0x0000...0x01FF Physical input area First 512 digital inputs512...1023 0x0200...0x03FF Physical output area First 512 digital outputs1024...4095 0x0400...0x0FFF - MODBUS exception:“Illegal data address”4096...8191 0x1000...0x1FFF %QX256.0...%QX511.15 PFC OUT areaVolatile PFC output variables8192...12287 0x2000...0x2FFF %IX256.0...%IX511.15 PFC IN areaVolatile PFC input variables12288...65535 0x3000...0xFFFF %MX0.0...%MX3327.15 NOVRAMRetain memoryPos : 98.22 /Alle Serien (Allgemeine D okumente) (Allgemeine M odul e)/F eldbus kommuni kati on/MOD BUS/MOD BUS-R egister-M apping - Bitz ugriff Schr eiben ( mit FC 5, FC15) (Contr oller, x42) @ 4\mod_1236078270062_21.doc x @ 27981 @ @ 1Bit Access Writing (with FC5 and FC15)Table 100: Bit access writing (with FC5 and FC15)MODBUS address Memory range Description[dec] [hex]0...511 0x0000...0x01FF Physical output area First 512 digital outputs512...1023 0x0200...0x03FF Physical output area First 512 digital outputs1024...4095 0x0400...0x0FFF - MODBUS exception:“Illegal data address”4096...8191 0x1000...0x1FFF %IX256.0...%IX511.15 PFC IN areaVolatile PFC input variables8192...12287 0x2000...0x2FFF %IX256.0...%IX511.15 PFC IN areaVolatile PFC input variables12288...65535 0x3000...0xFFFF %MX0.0...%MX3327.15 NOVRAMRetain memoryPos : 98.23 /D okumentati on allgemei n/Gli ederungsel emente/---Seitenwec hs el--- @ 3\mod_1221108045078_0.doc x @ 21810 @ @ 1
