Owner`s manual

Command reporting mode allows the host computer to

send commands requesting messages or any buffered

data from the V74 ports. These commands are

summarized in the table on the following page. See

Section 1.4.1 for the procedure to send commands.

As an example, suppose the V74 is installed in Unit 1

Module 15 and is using Command Reporting Method.

Once you select the V74 and issue the RS1<cr>

command, the module responds with a single message

from Port 1 similar to the following:

1:15,1 TEST MESSAGE where 1:15,1 represents Unit

1/Module 15/Port 1 and TEST MESSAGE is the actual

message. If the RBn<cr> command is issued, any data

stored in the buffer up to the time this command is sent

is sent to the host controller with each data block

preceded by the Unit#:Module#,Port#.The host

computer can connect and send data to any V74 port

regardless of the operating mode by sending the port

select code (default=$BT), the desired module number

(2 to 16), a comma, and the desired port number (1 to

4) followed by Carriage Return or Line Feed. For

example, to select Module 2 Port 1, the host computer

sends $BT2,1<cr> if using the default port select code.

The table below summarizes commands supported by

the V74 module. Please see section 15 of this manual

for more detailed operational description of the

supported commands.

V74 DAC COMMAND SUMMARY

Command Description

$BTBm<cr> (m=desired

module(s))

Broadcast mode. When this command is issued,

all data received by the host module is

broadcasted simultaneously out to all ports of the

selected module(s).

CBn<cr> (n=1 to 4, 0=all) Clear Buffer. This command clears all buffered

messages from the specified ports.

RAn<cr> (n=1 to 4, 0=all) Report All Buffered Messages. This command