WAGO-I/O-SYSTEM 750
Configuration and Parameterization
47
750-657 IO-Link Master
Manual
Version 1.0.2, valid from FW/HW-Version 02/01
9.1.1.2.1 Data Frame
To set the data width of the internal bus, press the
[Data Frame]
button. By
default, the data width is 4 bytes.
Which internal bus data width makes sense depends on the respective application.
It should be noted that minimum 4 bytes of the maximum 24 available are already
allocated. If you connect IO-Link devices that process more than 1 bit of process
data, then set the data width of the internal bus to a value greater than 4 bytes.
The Mailbox begins with an offset of 1 (after the control/status byte) in the
process image and occupies at least 2 bytes. The Mailbox size can be set to max. x
bytes (see the following formula) for configuring the IO-Link master.
x = Process image total size - 1 SIO byte - 1 control/status byte
The Mailbox size is 2 bytes by default. To increase the Mailbox size during the
configuration, enter the new required value manually in the respective "Length"
input field or use the arrow keys to select the value.
By entering a higher value in the "Length" field (e.g. 6 bytes), the data throughput
is increased and the configuration operations are executed faster.
The bigger the Mailbox, the more the process data moves back in the process
image of the IO-Link master.
Make sure the offsets are correct in the process image!
When increasing the size of the Mailbox, make sure you adjust the position of the
SIO byte and the offsets of the process data slots as required. Use the "AutoCalc"
function in WAGO-I/O-
CHECK
to determine and write the new values to the IOL
master.
Reset the Mailbox size after configuration!
Reset the Mailbox size after the configuration to the original value.
If the Mailbox size is not reset, Mailbox data may overlay important process data.
