INTERFACES
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5 Interfaces
5.1 IO-Link
IO-Link communication is used to control the entire SCTMi, set all of the parameters and provide a
wide variety of measurement and analysis data.
The IO-Link communication takes place using cyclical process data and acyclical ISDU parameters.
5.1.1 Process data
You use the cyclical process data to control the ejectors and receive the latest information reported
back from the SCTMi. There is a difference between the SCTMi output data (Process Data In) and the
controlling input data (Process Data Out).
Process Data In
“Process Data In” is used to report a wide variety of information cyclically.
The SCTMi “Device Status” in the form of a status traffic light
EPC data
o
Errors and warnings for the overall system and the individual ejectors
o
Sensor voltage, actuator voltage, total air consumption
o
Information for individual ejectors such as the vacuum, evacuation time, dynamic
pressure and air consumption of the individual ejector
The switching values H1 and H2 for all of the connected ejectors
Process Data Out
“Process Data Out” is used to control the SCTMi and the individual ejectors cyclically.
“Device Select” is used to select who is to send the EPC data
“EPC Select” is used to define which data is sent
To determine the air consumption, the system pressure can be preset
All of the ejectors are controlled using the suction and blow-off commands
The exact meaning of the data and functions is described in more detail below in the “Description of
functions” chapter. You can find a detailed diagram of the process data in the data dictionary and
IODD.
The process data width changes depending on the number of SCTMi ejectors. There is a
suitable IODD for up to 4, 8, 12 or 16 ejectors for each implementation.
