28 Table of Contents WAGO-I/O-SYSTEM 750750-597 8AO 0-10V/±10V DCManualVersion 1.0.04.1 OverviewPresentation of control/status bytes a function of fieldbus coupler/controller!The I/O module always makes a complete process image incl. control/status bytesavailable to the fieldbus coupler/controller. The WAGO-I/O-CHECK startup toolaccesses the startup process image.The fieldbus coupler/controller uses a different process image, in which display ofcontrol/status bytes can be supported, to stage cyclic process data via the fieldbus.Table 16: Process Image – I/O Module 750-597Process ImageOutput1) Input2)Byte 0 Status byte CH1_S0 Byte 0 Control byte CH1_C0Byte 1 Function of status byte: Processvalue CH1_D0Byte 1 Function of control byte: ReservedByte 2 Function of status byte: Processvalue CH1_D1Byte 2 Function of control byte: ReservedByte 3 Control byte CH2_S1 Byte 3 Control byte CH2_C1Byte 4 Function of status byte: Processvalue CH2_D0Byte 4 Function of control byte: ReservedByte 5 Function of status byte: Processvalue CH2_D1Byte 5 Function of control byte: Reserved… … … …Byte 21 Control byte CH8_S7 Byte 21 Control byte CH8_C7Byte 22 Function of status byte: Processvalue CH8_D0Byte 22 Function of control byte: ReservedByte 23 Function of status byte: Processvalue CH8_D1Byte 23 Function of control byte: Reserved1) CHx_Sx = Status byte x from channel xCHx_D0 = Low byte for process value for channel xCHx_D1 = High byte for process value for channel x2) CHx_Cx = Control byte x from channel x