NEC X981UHD External Control Codes - Page 120

22. LAN MAC Address 22.1 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' Message STX-'C'-'2'-'2'-'A'-'0'-'2'-ETX Check code Delimiter BCC CR Header SOH (01h) : Start of Header '0' (30h) : Reserved Monitor ID : Specify the Monitor ID from which you want to get status. Ex.) If Monitor ID is '1', specify 'A'. '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) Message STX-'C'-'3'-'2'-'A'-RC-'0'-'2'IPV-MAC(0)-....-MAC(n)-ETX Check code Delimiter BCC CR 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 (120/130)