Impulse 463E - Manual (Page 62)

© Sealevel Systems, Inc. - 59 - SeaI/O User Manual
(0x47) Set Communication
The Set Communication command can be used two different ways. The first method
is a direct one-to-one communication with a single SeaI/O module. This requires a
Get Config request to obtain the Magic Cookie byte. However, to easily change the
communication parameters of multiple SeaI/O modules at the same time, the Set
Communication operation can be broadcast to all daisy-chained modules. A sample
transaction is shown with an assumed Magic Cookie byte of 0xCA, which is only
required for one-to-one communication.
Request Response
Field Name (Hex) Field Name (Hex)
Function 47 Function 47
Baud Rate 0A Baud Rate 0A
Parity 00 Parity 00
Magic Cookie CA Magic Cookie CA
Upon a successful Set Communication operation, the SeaI/O module will respond
with the same packet it received. An exception can be generated if one of the
following conditions occurs:
• The baud rate is not within the range [1, 0A] (Hex)
• The parity rate is not within the range [0, 2]
• The Magic Cookie is invalid (one-to-one communication only)