3 Description of functions
3-42
Header
Contains the Ethernet header.
Subheader
Contains the subheader for the request message.
When adding a serial No. to the request message
(when the serial No. is 1234H)
When not adding a serial No. to the request message
• When performing data communication in ASCII code
Serial Nos. are stored in the order from higher-order byte to lower-order byte.
• When performing data communication in binary code
Serial Nos. are stored in the order from lower-order byte to higher-order byte.