User's Manual

30
7.2 Process data
container
7.3 Direct parameter
page
The IO-Link protocol provides a process data container 32 bytes in size. Addressing is done in
the command byte which the IO-Link Master sends. When process data are sent, addressing is
directly to the sub-indices 00hex … 1Fhex.
The BIS L-409-… processes 8 bytes of input and 8 bytes of output data (input buffer/output
buffer). The process data are mapped to the first 8 bytes of the process data container (sub-
indices 00hex…07hex).
IO-Link protocol
Subaddress
BIS L-409 IO-Link Device
Subaddress
00hex
⇒
00hex
... ... ...
07hex
⇒
07hex
08hex
...
1Fhex
The Direct Parameter Page (DPP) contains 32 bytes of application-specific parameters and
parameters for setting IO-Link communication. This corresponds to the first two pages of the
Service Protocol Data Unit (SPDU) with 16 bytes each. Although the SPDU of the BIS L-409
devices is not supported, access to the DPP is made via Index, Subindex and length (in bytes) of
the SPDU.
With Subindex 0 all 16 bytes of the Index can be accessed; the length determines how many
parameters are read or written. With a Subindex > 0 a particular element of the Index is
accessed, and the length specification is not used. Specification of these values depends on the
IO-Link Master and the controller.
The most important parameters are summarized in the following table. Each parameter has a
data width of 1 byte.
DPP SPDU Parameter Access BIS
L-409
Meaning
Address Index Sub-
index
00hex
0 1
Master
Command
R/W - Determines the mode:
5A
hex: Standard-IO mode
97hex: Restart communication
98hex: Communication running,
output data valid
1)
99hex: Communication running,
output data invalid
2)
01hex
0 2
Master
Cycle Time
R/W - Used cycle time, specified by IO-
Link master
02hex
0 3
Min. Cycle
Time
R
3)
Minimum cycle time achievable by
the device
03
hex
0 4
Frame
Capability
R 02hex The device supports Frame Type 1
Legend:
W: Write
R: Read
1) Device accepts output data from the
master.
2) Device does not accept output data
from the master and uses the last valid
output data.
3) 25hex at 230.4 kbaud
35hex at 38.4 kbaud
62hex at 4.8 kbaud
IO-Link Basics
7
BIS L-409 IO-Link Device
Processor