6.8 Identification & maintenance
functions (I&M)
6 Starting operation
Data object
Length
[byte]
Access Default value / Description
NDEX_CAP1
1
Read
0xFF (Client Access Point for IOL_CALL)
Table 14: I&M 99 (Slot 1, Index 0xB063)
IO-Link Device I&M functions
The IO-Link device-specific I&M functions 16 and 23 can be read via slot 1,
sub-slot 1. The specified index is used for mapping the data sets. Only data
not equal to zero are received if a connection to an IO-Link device can be
established.
Data object
Length
[byte]
Access Default value / Description
VENDOR_ID
2
Read
0x0000 (IO-Link Device Vendor ID)
DEVICE_ID
4
Read
0x00000000 (IO-Link Device ID)
FUNCTION_ID
2
Read
0x0000 (IO-Link Device Function ID)
RESERVED
10
Read
0x00 ff.
Table 15: I&M 16 ... 23 (Slot 1, Subslot 1, Index 0xB000...0xB007)
6.8.2 Reading and writing I&M data
In its standard library, SIEMENS offers
STEP 7
system function modules that
allow I&M data to be read and written. A data set contains a 6-byte block
header and the actual I&M record.
The data requested on reading, or the data to be written thus only start after
the existing header. On writing, the header content must additionally be taken
into account. Following table shows the structure of a data set.
Manual LioN-P PROFINET IO-Link Master
Version 2.1 10/2017
62