WAGO-I/O-SYSTEM 750
I/O Modules 351
750-880, 750-880/025-000 ETHERNET Programmable Fieldbus Controller
Manual
Version 1.0.1
13.3.5 Specialty Modules
WAGO has a host of Specialty I/O modules that perform various functions. With
individual modules beside the data bytes also the control/status byte is mapped in
the process image. The control/status byte is required for the bidirectional data
exchange of the module with the higher-ranking control system. The control byte
is transmitted from the control system to the module and the status byte from the
module to the control system.
This allows, for example, setting of a counter with the control byte or displaying
of overshooting or undershooting of the range with the status byte.
The control/status byte always lies in the low byte for the fieldbus
coupler/controller with Ethernet/IP.
Information
Information to the structure of the Control/Status byte
For detailed information about the structure of a particular module’s control/status
byte, please refer to that module’s manual. Manuals for each module can be found
on the Internet under:
The Specialty Modules represent as analog modules.
For this, the process input data of the Specialty Modules seize one Instance per
channel in the Analog Input Point Object (Class 0x67) and the process output data
seize one Instance seize one Instance in the Analog Input Point Object (Class
0x67) per channel in the Analog Output Point Object (Class 0x68).
13.3.5.1 Counter Modules
750-404, (and all variations except of /000-005),
753-404, (and variation /000-003)
The above Counter Modules have a total of 5 bytes of user data in both the Input
and Output Process Image (4 bytes of counter data and 1 byte of control/status).
The counter value is supplied as 32 bits. The following tables illustrate the Input
and Output Process Image, which has a total of 3 words mapped into each image.
Word alignment is applied.
Table 387: Counter Modules 750-404, (and all variations except of /000-005),
753-404, (and variation /000-003)
Input Process Image
Byte Destination
Instance
High Byte
Low Byte
Description
- S Status
byte
D1 D0
n
D3 D2
Counter value
The specialty modules represent 1x6 bytes input data and seize 1 Instance in Class
(0x67).
