Omron NXR Series User Manual page 336

Appendices
Busy
*1. If the IO-Link Master Unit performs the command write process during message processing, an error re-
sponse is returned. If that happens, end the process. After ending the process, perform the command
write process again.
*2. If the controller does not support complete access, perform reading or writing for each subindex number.
*3. If you write for each subindex number, write the Control object last.
*4. Give an interval after the command writing process before executing the response read process. This al-
lows you to prevent repeating of the read process due to being busy.
*5. An error response or timeout for the execution of a communications instruction.
A-56
Start
Error response or
timeout
*2*3
Write command
Normal response
Error response or
timeout
Read response *2*4
Normal response
Operation stopped or sequence
number does not match
Check status and
sequence number
• Successful
• Error (IO-Link Master Unit detection)
• Error (IO-Link device detection)
Notification of
response acquisition
Normal response
End
NXR-series IO-Link Master Unit for EtherCAT User's Manual (W640)
*1*5
*5
Error response or
timeout *5