Comtrol IOLM 4-EIP - Manual (Page 41)

IO-Link Master 4-EIP User Guide: 2000582 Rev. A Chapter 5. IO-Link Port Configuration - 41
Editing Modbus/TCP Settings
5.3.1. Editing Modbus/TCP Settings
1. If necessary, open the IO-Link Master web interface with your web browser using the IP address.
2. Click Configuration in the menu bar.
3. Click the MODBUS/TCP SETTINGS submenu.
4. Click the EDIT button for the port that you want to configure.
5. Make appropriate selections for the IO-Link device that you will connect to that port. You can use the help
system if you require definitions or values for the options or
5.3.2. Modbus/TCP Settings Parameters on
Page 41.
6. Scroll to the top of the page and click the SAVE button.
Make sure that the port now displays the EDIT button.
If it displays the SAVE and CANCEL buttons, that means that one of the parameters contains an incorrect
value. If necessary, scroll down the page, make the needed corrections, and click SAVE.
5.3.2. Modbus/TCP Settings Parameters
The following table illustrates the Modbus/TCP Settings page.
Modbus/TCP Settings Page
ISDU Response Timeout
Default = 20 seconds
The time that the IO-Link Master’s Modbus/TCP interface waits for
a response to an ISDU request. The timeout needs to set long
enough to allow all commands within the ISDU request to be
processed.
Valid range: 1-10,000 seconds
Process Data Settings
PDI Data Block Size
Default: 36-bytes
The configurable PDI data block length. Optional lengths are:
• 4-bytes (header only)
• 8-bytes (4 bytes data)
• 16-bytes (12 bytes data)
• 24-bytes (20 bytes data)
• 36-bytes (32 bytes data)
PDI Byte-Swap Method
Default: No byte-swap
If enabled, the IO-Link Master swaps the data bytes in word (2 byte)
format or dword (4 byte) format. Options include:
• No byte-swap – data passed through as received
• Word (16-bit) byte-swap – data is byte-swapped in word format
• Dword (32-bit) byte-swap – data is byte-swapped in dword
format
Note: Because both IO-Link and Modbus/TCP use big-endian byte
ordering, byte swapping typically is not required for word and
dword data.
Byte swapping is most commonly required when receiving
byte (8-bit) data and it is desired to place the first data byte in
the least significant byte position of the holding register. For
these cases, word (16 bit) byte-swap is typically used.