AMIS-49587_P2 Datasheet, PDF (36/55 Pages) ON Semiconductor – Power Line Carrier Modem

AMIS--49587
Table 38.
Field
<STX>
Length
Command
User_Data
CHK
Byte Length
1
1
1
0 .. 247
2
Value
02h
03h .. 250
00h .. FEh
Byte String
0000h .. 65535
Description
Start of text delimiter
Length of the Command, User_Data fields and CHK.
Command code
Zero to 247 data bytes.
The checksum of the local frame is the result of the addition of the
elements of the frame, from length up to the last UserData byte, or
up to the Command byte if there is no UserData byte. The CHK is
sent with LSB first.
Important: Frame in little endian format (LSByte first)
Table 39. SUMMARY OF FRAME DELIMITERS
Character
<STX>
Start of text; first char of frame
<ACK>
Acknowledgment
<NAK>
Non Acknowledgment
<?>
Start of Status Message
Definition
ASCII Code
02h
06h
15h
3Fh
Power On Reset
SET, Monitor
ResetRequest/reset
Validate Monitor Cfg
Reset
NOT SET
WriteConfigNew_Request/check config data
Validate Master Cfg
Reset
SET Master
ResetRequest/reset
Validate Slave Cfg
Reset
SET Slave
ResetRequest/reset
Invalid Cfg
Figure 30. PLC MODEM State Diagram
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