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10 IO-Link Master Unit
GX-series EtherCAT Slave Unit User’s Manual
10-3 F
u
n
ction
s of
th
e IO-Lin
k
Mas
ter Un
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10
10-3 Functions of the IO-Link Master Unit
This section provides an overview of the functions of the IO-Link Master Unit.
For details, refer to the
IO-Link System User’s Manual (W570).
Function name Description
Communic
ations
Cyclic communications
I/O data (process data) in the IO-Link devices is cyclically exchanged
with the IO-Link Master Unit as the IO-Link communications master.
At the same time, this data and the status of the IO-Link Master Unit is
cyclically shared with the host communications master, with the IO-Link
Master Unit operating as the host communications slave.
Cyclic communications can be used to check the amount of detection
performance deterioration in devices, and to check changes in usage
conditions (e.g., amount of incident light for photoelectric sensors,
stability detection margins, and excessive proximity for proximity
sensors).
Message
communications
The host communications master can send messages (commands) to
the IO-Link Master Unit and receive the response from the IO-Link
Master Unit.
The IO-Link Master Unit can also function as a gateway to send
messages (commands and responses) between the host
communications master and the IO-Link devices.
Refer to
6-3 Message Communications in the IO-Link System User’s
Manual (Cat. No. W568).
During operation, you can change and adjust device parameters (e.g.,
threshold settings, tuning execution, and ON-delay time changes) from
a program.
During operation, you can check the internal status, such as the
operating times of devices.
Communications mode settings
You can select any of the following modes for each port:
IO-Link Mode, SIO (DI) Mode, SIO (DO) Mode, and Disable Port. This
allows you to combine IO-Link communications and digital I/O in a
single terminal or unit.
Digital inputs for Pin 2
In IO-Link Mode, you can perform digital input with Pin 2 while
performing IO-Link communications.
Automatic baud rate setting for IO-Link
communications
The IO-Link Master Unit automatically matches the specific baud rates
(COM1, COM2, or COM3) of the IO-Link devices to communicate with
the IO-Link devices.
Therefore, it is not necessary to set the baud rate of the connected
device for each port.
Connected device verification
This function is used to verify the configuration of IO-Link devices that
are registered for connection to the IO-Link Master Unit (as set in the
IO-Link Device Configuration Settings or the IO-Link Device Information
Area) when the power supply is turned ON .
The user can enable or disable connected device verification.
IO-Link communications error
detection
This function detects I/O cable breaks, disconnections from IO-Link
device ports, error-level device events, device configuration verification
errors, and IO-Link device malfunctions.
Detection of short-circuits in I/O cables This function detects short-circuits in device cables.
Input Data Enabled Flags
The host controller can use the process Input Data Enabled Flags to
determine whether the IO-Link input data for IO-Link communications is
valid.