SG Security Communications MLR2-E Instrukcja Użytkownika Pobierz pdf (Strona 5)

Form Number.: 7-3005 File Name: SG Automation Output Revision/Date: 01/May 3, 2005

Department: Engineering

Division: Embedded Software Form Template Owner: Jeff Cougler

1.4 B32 Headers

The MLR2000 and System III receivers contain an option to add 4 additional bytes to all packets. The default for this option is

disabled.

1. B32 Headers apply only to TCP/IP automation messages, not serial messages or printer messages.

2. When enabled ALL outgoing and incoming automation messages will contain 4 extra bytes at the start of each packet.

These four bytes are:00 00 LL LL

where LL LL = is the BCD value of the size of the entire packet..

ie.. if the original length was 1B HEX bytes to be sent, the packet would be:

00 00 00 31 <original packet>

and the ACK back to the receiver will be:

00 00 00 05 06

1 2 3 4 5 6 7 8 9 10 ... 58 59

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SG Security Communications MLR2-E Instrukcja Użytkownika Strona 5