30 Process Image
WAGO-I/O-SYSTEM 750
750-439 8DI NAMUR Ex i
Manual
Version 1.3.0, valid from HW Version 03, SW Version 03
4
Process Image
Mapping of process data in the process image of fieldbus systems
The representation of the process data of some I/O modules or their variants in
the process image depends on the fieldbus coupler/controller used. Please take
this information from the section “I/O Modules” included in the description
concerning the process image of the corresponding coupler/controller.
The I/O Module 750-439 provides the fieldbus coupler/controller 2 bytes in the
input and output process image.
The signal status of inputs DI 1 … DI 8 is transmitted to the fieldbus
coupler/controller via input data byte D0, the error status via input data byte D1.
Diagnostic deactivation is transferred to the I/O module via output data byte D1.
Output data byte D0 determines whether a make contact or break contact is
connected.
Table 18: Input Byte D0 (Signal Status)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
IN8
IN7
IN6
IN5
IN4
IN3
IN2
IN1
IN1
Digital input 1
IN2
Digital input 2
IN3
Digital input 3
IN4
Digital input 4
IN5
Digital input 5
IN6
Digital input 6
IN7
Digital input 7
IN8
Digital input 8
Table 19: Input Byte D1 (Error Status)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
DIA8
DIA7
DIA6
DIA5
DIA4
DIA3
DIA2
DIA1
DIA1
Diagnostics 1
DIA2
Diagnostics 2
DIA3
Diagnostics 3
DIA4
Diagnostics 4
DIA5
Diagnostics 5
DIA6
Diagnostics 6
DIA7
Diagnostics 7
DIA8
Diagnostics 8