Owner`s manual

139
15.2.4 OPERATING IN COMMAND MODE
Command mode provides multiplexing to a host module
of messages or buffered data from individual ports or all
ports upon request from the host computer via data
commands. The host computer can request single
messages, all messages, or all current buffered data for
individual ports. V50/V73/V74/V75/V76/V86/V87 data
commands are sent through a host module using the
following procedure:
1. Select the 4-port serial module from the host
module by sending the port select code ($BT -
default), the appropriate Unit Number followed by
a colon (1: to 30: - only if using cascaded units),
the desired module number (2 to 16), and a
terminating character of Carriage Return or Line
Feed. For example, to select a V74 installed on a
non-cascaded unit as Module 2 using the default
port select code, send $BT2<cr>.
2. Once the 4-port serial module is selected, it is
placed into command mode and allows you to
send data commands. Data commands consist of
two capital letters designating the specific
command, the desired port number(s), and a
Carriage Return. If you have a requirement to
send the same command to multiple channels
simultaneously, you can use one of the following
formats as shown for the CBn<cr> (clear buffer)
command:
CB1,2,3,4,5,6,7,8<cr> Clear the buffer for Ports 1-
8
CB0<cr> Clear the buffer for Ports 1-
8
CB1,2,4,5<cr> Clear the buffer for Ports 1,
2, 4,