Schmalz SCPSi - Page 27

6 Operating Modes
EN-US · 30.30.00.00424 · 07 · 10/23 27 / 86
The process data is exchanged cyclically between the IO-Link master and the product (data transmission
rate with COM2 = 38.4kBit/sec.).
ISDU parameter data (acyclical data) is exchanged only on request. It is exchanged by the user program in
the control unit (e.g. using communication modules).
6.2.1Process Data
The cyclical process data is used to control the ejectors and receive current information reported from the
ejector. There is a difference between the input data (Process Data In) and the controlling output data
(Process Data Out).
The input data Process Data In is used to report the following information cyclically:
• Vacuum limit values H1 and H2
• CM-Autoset acknowledgment
• EPC-Select acknowledgment
• The ejector device status in the form of a status traffic light
• Multifunctional EPC values
The output data Process Data Out is used to control the ejector cyclically:
• Vacuum on/off
• Blow off active
• Setup mode
• CM Autoset
• EPC-Select: switching the multifunctional EPC values
• Switching production setup profiles P0–P3
• Inlet pressure in 0.1bar (measured value from external pressure sensor, 0 =
function inactive)
A detailed description of the process data can be found in the data dictionary.
The corresponding device description file (IODD) is available for integration into a higher-level control
unit.
6.2.2Parameter Data
In addition to the process data that is exchanged automatically, the IO-Link protocol provides an acyclical
data channel for identification data, setting parameters or general feedback from the device. The avail-
able data objects are referred to as ISDU with IO-Link and are to be uniquely addressed within a device
through their index and subindex.
Controller manufacturers usually provide a specialized function module – e.g. the “IOL_CALL” module for
Siemens controllers – to enable these parameters to be accessed from a control program.
Information about which parameter data the device provides and how this data is displayed as ISDU ob-
jects can be found in the “Data Dictionary”.