Process Image; Overview; Table 19: Process Image - WAGO 750-451 Manual

WAGO-I/O-SYSTEM 750
750-451 8 AI RTD
4

Process Image

4.1

Overview

Representation of control/status bytes depending on the fieldbus
coupler/controller!
The I/O module always makes its complete process image incl. control/status
bytes available to the fieldbus coupler/controller. The WAGO-I/O-CHECK
commissioning tool accesses the complete commissioning process image. The
fieldbus coupler/controller uses a different process image to stage cyclic process
data via the fieldbus. In the other process image, depending on the fieldbus
coupler/controller, the representation of control/status bytes can be suppressed.

Table 19: Process Image

Byte 0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
...
Byte 21
Byte 22
Byte 23
*) CHx_Sx = Status byte x from channel x
CHx_Cx = Control byte x from channel x
CHx_D0 = Low-byte of the process or register value from channel x
CHx_D1 = High-byte of the process or register value from channel x
Input*
Status byte CH1_S0
Depending on the status byte:
Process value or register value
CH1_D0
Depending on the status byte:
Process value or register value
CH1_D1
Status byte CH2_S1
Depending on the status byte:
Process value or register value
CH2_D0
Depending on the status byte:
Process value or register value
CH2_D1
...
Status byte CH8_S7
Depending on the status byte:
Process value or register value
CH8_D0
Depending on the status byte:
Process value or register value
CH8_D1
Process image
Byte 0 Control byte CH1_C0
Byte 1 Depending on the control byte:
Reserved or register value CH1_D0
Byte 2 Depending on the control byte:
Reserved or register value CH1_D1
Byte 3 Control byte CH2_C1
Byte 4 Depending on the control byte:
Reserved or register value CH2_D0
Byte 5 Depending on the control byte:
Reserved or register value CH2_D1
... ...
Byte 21 Control byte CH8_C7
Byte 22 Depending on the control byte:
Reserved or register value CH8_D0
Byte 23 Depending on the control byte:
Reserved or register value CH8_D1
Process Image 29
Output*
Manual
Version 1.2.0