308 Fieldbus Communication
WAGO-I/O-SYSTEM 750
750-880, 750-880/025-000 ETHERNET Programmable Fieldbus Controller
Manual
Version 1.0.1
12.3.5.42 Input Fieldbus Variable UDINT Offset (AB
hex
)
This class allows the reading of data from a particular PLC input variable.
With an offset of 2 bytes to the addresses of the "Input Fieldbus Variable UDINT
(AA hex)" class, that means for WAGO-I/O-
PRO
or CoDeSys the PLC addresses
for the input variables %ID638 ... %ID765.
Information
Information about Using the Offset
"Offset of 2 bytes" means:
If instance 1 of this class is read, you obtain High-Word of the address %ID638
and the Low-Word of the address %ID639, etc.
If instance 128 is read, you obtain only the High-Word of the address %ID765.
Instance 0 (Class Attributes)
Table 310: Input Fieldbus Variable UDINT Offset (AB
hex
) – Class
Attribute
ID
Access
Name
Data type
Description
Default
value
1
Get
Revision
UINT
Revision of this object
1 (0x0001)
2
Get
Max Instance
UINT
Max. number of instances
128 (0x080)
Instance 1...128 (Input variable 1 up to 128)
Table 311: Input Fieldbus Variable UDINT Offset (AB
hex
) – Instance 1...128
Attribute
ID
Access
Name
Data type Description
Default
value
1 Set
Fb_In_Var
UDINT
Fieldbus-Input variable of the SPS 0
Common Services
Table 312: Input Fieldbus Variable UDINT Offset (AB
hex
) – Common service
Service available
Servicecode
Class Instance
Service-Name
Description
0E
hex
Yes
Yes
Get_Attribute_Single Supplies contents of the appropriate
attribute
10
hex
No
Yes
Set_Attribute_Single Modifies an attribute value
