American access system ADV-1000 Betriebsanweisung PDF herunterladen (Seite 157)

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Panel Buffer Commands

When a panel is buffered, transactions are stored in

the panel RAM memory. When a panel is unbuffered,

it transmits stored information to a computer, then

continues to transmit ongoing access transactions to

that computer in the unbuffered mode of operation.

A buffer command can be either hard or soft.

Normally, when an unbuffered panel receives a

buffer command, it switches to the buffered mode.

When the buffered panel receives an unbuffer

command, it switches back. However, if a panel

receives multiple soft buffer or unbuffer commands,

it does not switch modes until it receives the same

number of unbuffer or buffer commands.

An example of this would be to buffer [soft buffer]

certain panels in the system while leaving other

panels unbuffered, then shutting down the computer.

If the communication server is set to buffer on

exiting the database server, another buffer [soft

buffer] command is sent to all panels. When

restarting the computer, the services are started, and

based on communication server settings, the panels

are sent an unbuffered command [soft unbuffer]. The

previous panels that received two soft buffer

commands remain buffered, according the their

setting before shutting down the computer.

A hard buffer or unbuffer command overrides any

number of soft commands. When a panel receives a

hard buffer or unbuffer command it switches state,

regardless of how many soft buffer or unbuffer

commands have been received.

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