Siemens S7-1200 - SM 1278 4 Xio-Link Master; SM 1278 4 Xio-Link Master Overview; Overview; IO-Link and Your STEP 7 Program

S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
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SM 1278 4xIO-Link Master
15
15.1
SM 1278 4xIO-Link Master overview
15.1.1
Overview
The SM 1278 4xIO-Link Master is a 4-port module that functions as both a signal module
and a communication module. Each port can operate in the IO-Link mode, single 24 VDC
digital input or 24 VDC digital output.
15.1.2
IO-Link and your STEP 7 program
The IO-Link master programs acyclic communication with an IO-Link device using the
IOL_CALL function block (FB) in your STEP 7 S7-1200 controller program. The IOL_CALL
FB indicates the IO-Link master your program uses, and which ports the master uses for
data exchange.
Visit the Siemens Industry Online Support website (http://support.automation.siemens.com)
for details on working with the IOL_CALL FB. Enter "IO-Link" in the website's search box to
access information about IO-Link products and their use.