Owner's manual

Table Of Contents
1.4.4 Interleaved Blocks
The Equipment never sends interleaved blocks to the Host. That is, the Equipment always sends all
blocks of one message before sending the first block of the next message. This simplifies the job of the
Host.
However, the Equipment allows the Host to send interleaved blocks, if it so chooses.
1.4.5 Simultaneous Transactions
The Equipment may initiate several simultaneous outstanding SECS transactions. That is, the Equipment
may send a secondary primary message before the Host has sent the Reply to a previous primary message.
Mainly, this occurs when the Equipment reports Alarms and Events. The Host can reduce the number of
outstanding transactions initiated by the Equipment by setting equipment constants appropriately so that
the Equipment sends no W-Bit for Stream 5 (Alarm), Stream 6 (Event), and Stream 10 (Free Text)
messages.
The Equipment allows the Host to initiate at least two (2) simultaneous outstanding transactions.
1-6 Equipment-to-Host Messages