Functions - Siemens SIMATIC ET 200eco PN M12-L Equipment Manual

3.3

Functions

IO-Link is a point-to-point connection between an IO-Link master and an IO-Link device. On
the IO-Link master, you can use IO-Link devices as well as conventional sensors/actuators
with unshielded standard cables using proven 3-wire technology. IO-Link is downward-
compatible to conventional digital sensors and actuators. The switching state and data
channels are designed with trusted 24 V DC technology.
Master Backup
The "LIOLink_Master" function block is used to read all relevant IO-Link device and IO-Link
master parameters. These can be stored retentively at a central location, such as in a data
block in the IO controller.
The status of the IO-Link devices or IO-Link ports stored in the IO-Link master can be restored
with the "LIOLink_Master" function block.
As a result, the IO-Link ports and the IO-Link master are configured with the values stored in
the master backup.
A typical application is the restoration of parameters after replacement of the IO-Link master.
Port Qualifier Information (PQI)
Each port has Port Qualifier Information (PQI). This PQI provides information on the device
status of the port and IO-Link. The PQI is transmitted cyclically with the process data. The PQI
cannot be deactivated.
Port configuration
With an IO-Link master CM 8xIO-Link + DIQ 8x24VDC M12-L, you can commission the IO-Link
submodules (ports) of the IO-Link master or the connected IO-Link devices in two different
ways:
• Port configuration without S7-PCT
• Port configuration with S7-PCT
Port configuration without S7-PCT
Requirements
You have selected the "Port configuration without S7-PCT" check box in the configuration of
the IO-Link master submodule in STEP 7.
Procedure
You configure the IO-Link master submodules directly in STEP 7:
• Activate the diagnostics
• Port mode:
– Operation in "IO-Link autostart" mode (default)
– Operation in "IO-Link manual" mode
CM 8x IO-Link + DIQ 8x24VDC M12-L 8xM12 (6ES7148-6JJ00-0BB0) communications module
Equipment Manual, 12/2022, A5E51718265-AB
Product overview
3.3 Functions
19