Leuze electronic MD 748i Connecting And Operating Instructions page 26

 SIO Digital Out Mode.
IO-Link Port modules are used to configure the mode of an IO-Link port.
All the IO-Link modules start with the IO-Link (that is: IO-Link In, IO-Link Out and IO-Link In/Out)
configure the corresponding IO-Link port as IO-Link Mode. An SIO Digital In module configures the IO-
Link port as SIO Digital In Mode. Similarly, an SIO Digital Out module configures the port as SIO Digital
Out Mode.
 An IO-Link module can be input only, output only or both. In addition, there are different modules
with various IO data sizes (1 to 32 bytes). For example, the IO-Link In/Out 4 bytes module is for
an IO-Link device that supports up to 4-byte PDI data and 4-byte PDO data. If you do not find an
exact matching IO size, select the next size (larger). For instance, use IO-Link in 16-bytes
module for an IO-Link device that has 10-byte PDI data. The unused PDI data is filled with zeros.
 For SIO Digital In module, the PDI data is fixed at 1-byte. A high voltage on the IO-Link port C/Q
Pin results in a 0x01 PDI data; a low voltage on the C/Q Pin results in a 0x00 PDI data.
 For SIO Digital Out module, the PDO data is fixed at 1-byte. A zero output value from an SIO
Digital Out module sets the IO-Link port C/Q pin to low voltage. Any non-zero output value sets
the C/Q pin to high voltage.
IO-Link Port modules are allowed in Slot 1 to 4 on the MD 748I-11-42/L5-2222 model, or Slot 1 to 8 on
the MD 248i-12-8K/L4-2R2K models. Slot 1 is corresponding to IO-Link Port 1. Slot 2 is for IO-Link Port
2, so on and so forth.
If a slot is unpopulated, the corresponding IO-Link port is not configured. That port uses the previously
configured settings, or default settings if it has not been configured before.
3.7.1.1 IO-Link Port Settings
Additional IO-Link port settings can be configured by using module parameters.
3.7.1.2 IO-Link Port Module Parameters
Use the following information to configure IO-Link port module parameters.
1. Double-click an IO-Link Port module.
2. Select the Parameters table. Available parameters are shown in the following figure and the table
describes how to use the parameters.
Leuze electronic
IO-Link Port Module Input Data Format
Byte Offset Description
0 PDI Data Block byte 0
1 PDI Data Block byte 1
... ...
31 PDI Data Block byte 31
IO-Link Port Module Output Data Format
Byte Offset Description
0 PDO Data Block byte 0
1 PDO Data Block byte 1
... ...
31 PDO Data Block bytes 31
3 Configuring the IO-Link Master with STEP 7
MD 748i / MD 248i 26