WAGO-I/O-SYSTEM 750
Appendix
99
750-657 IO-Link Master
Manual
Version 1.0.2, valid from FW/HW-Version 02/01
11.1.3
Communication via the Cyclic Services
In addition to the usual cyclic transfer of a statically mapped process image per
port, another service provides the option of fragmented transfer of cyclic process
data. Fragmentation is required if the data width of the device is larger than the
possible or configured segment of the port in the process image.
Figure 39: Communication via the Cyclic Services
IOL_CALL
acyclic
IOL_PD
cyclic
IOL_DIAG
acyclic
IO-Link master
IOL-M Basic
IOL-M Port
I&M 0..4
IOL-M Directory
Kommandoregister
Master parameter
Process image
Port 1-4
Diagnosis
IO-Link master/
IO-Link device
Port 1-4
Port 1-4
Port 1-4
Port 0-4
IO-Link
device 1
ISDU*
Device PI
Device
diagnosis
IO-Link
device 1
ISDU*
Device PI
Device
diagnosis
* “Indexed Service Data Unit“, see section
"Parameter Access via ISDU"