Lan Mac Address; Lan Mac Address Read - NEC X754HB Manual

23. LAN MAC Address

23.1 LAN MAC Address Read

This command is used in order to read the MAC Address.
1) The controller requests the monitor to read MAC Address
Header
SOH-'0'-Monitor ID-
'0'-'A'-'0'-'8'
Header
SOH (01h) : Start of Header
'0' (30h) : Reserved
Monitor ID : Specify the Monitor ID from which you want to get status.
'0' (30h) : Message sender is the controller.
'A' (41h) : Message Type is "Command".
'0'-'8' (30h, 38h) : Message length is 8 bytes.
Message
STX (02h): Start of Message
'C'-'2'-'2'-'A': LAN read command.
'0'-'2': MAC Address
ETX (03h): End of Message
Check code
BCC: Block Check Code
Refer to the section 4.3 "Check code" for a BCC calculation.
Delimiter
CR (0Dh): End of packet
2) The monitor replies MAC Address to the controller.
Header
SOH-'0'-'0'-Monitor ID-
'B'-LN(H)-LN(L)
Header
SOH (01h): Start of Header
'0' (30h): Reserved
'0' (30h): Message receiver is the controller.
Monitor ID: Indicate a replying Monitor ID.
Ex.) When this byte is set to 'A', the replying Monitor ID is '1'.
'B' (42h): Message Type is "Command reply".
LN(H)-LN(L): Message length (byte length), from STX to ETX
Message
STX(02h):Start of Message
'C'-'3'-'2'-'A': LAN read reply command.
RC: Reply result Code
'0'-'0' (30h, 30h): Normal
'F'-'F' (46h, 46h): Abnormal
'0'-'2': MAC Address
IPV: IPv4 or IPv6
'0'-'4' (30h, 34h): IPv4
'0'-'6' (30h, 36h): IPv6
MAC(0-n): MAC Address
In the case of IPv4 -> n = 4
STX-'C'-'2'-'2'-'A'-'0'-'2'-ETX
Ex.) If Monitor ID is '1', specify 'A'.
STX-'C'-'3'-'2'-'A'-RC-'0'-'2'-
IPV-MAC(0)-....-MAC(n)-ETX
Message
Message
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Check code Delimiter
BCC CR
Check code
Delimiter
BCC CR