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8.4.1 Acyclic IO-Link access
Acyclic access to different data areas in the IO-Link master or access to the
data of the IO-Link devices takes place via PN-IO read/write services:
Read/Write services for I&M data in the master and IO-Link devices
IO-Link function block IOL_Call with ISDU (Index Service Data Unit)
IOL_Index 0x0000 – 0x7FFF and IOL_Subindex 0x00 – 0xFF
(See: IO-Link Integration Part1 2812_V100_080124 and IO-Link Integration
for PROFINET_Ed2_2832_V10_Jun17)
The IO-Link function block supports the following tasks:
Parametrization of an IO-Link device
Diagnostic of an IO-Link device
Execution of IO-Link port functions
Back-up and recovery of IO-Link device parameters
The IO-Link function block is supplied by the controller manufacturer (e.g. Sie-
mens FB IO_Link_Device for TIA Portal), see chapter 8.4.3 "IO-Link function
block".
NOTE
Further information on this can be found in the manual of the respective con-
trol manufacturer.
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