ICP DAS USA I-7540D - Manual (Page 65)

4.6 99C
Description: Clear the CAN error flag and FIFO on the module.
¾ Syntax: 99C
99C Command character.
¾ Response:
Valid Command: No response.
Invalid command: ERROR
¾ Note:
After sending this command, the CAN receive and transmit FIFO will be
clear. The error counter of reception and transmission will be set to zero.
And the TX and RX LEDs will turn OFF.
¾ Example:
Command: 99C
Note: This command can only be accepted by 7540D’s port 10000
i-7540D CAN-Ethernet Gateway User’s Manual (Version 1.4, April/2008) 65