I/O Modules • 135Process Data Architecture for MODBUS/TCPWAGO-I/O-SYSTEM 750ETHERNET TCP/IPInput Process ImageBit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0Diagnosticbit S 3Channel 2Diagnosticbit S 2Channel 2Diagnosticbit S 1Channel 1Diagnosticbit S 0Channel 1Output Process ImageBit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0not used not usedcontrolsDO 2Channel 2controlsDO 1Channel 14 Channel Digital Output Modules750-504, -516, -519, -531, 753-504, -516, -531, -540Output Process ImageBit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0controlsDO 4Channel4controlsDO 3Channel3controlsDO 2Channel2controlsDO 1Channel14 Channel Digital Output Modules with Diagnostics and Input ProcessData750-532The 750-532 digital output modules have a diagnostic bit for each outputchannel. When an output fault condition occurs (i.e., overload, short circuit, orbroken wire), a diagnostic bit is set. The diagnostic data is mapped into theInput Process Image, while the output control bits are in the Output ProcessImage.Input Process ImageBit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0Diagnostic bit S 3Channel4Diagnostic bit S 2Channel3Diagnostic bit S 1Channel2Diagnostic bit S 0Channel1Diagnostic bit S = '0' no ErrorDiagnostic bit S = '1' overload, short circuit, or broken wire
