Owner`s manual

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command has the following format: SRn<cr> where n is
the desired port number (1 to 4 or 0 for all).
15.2.4.6 PORT ID STATUS (ID) COMMAND
The Port ID Status (ID) command instructs the
V50/V73/V74/V75/V76/V86/V87 to report its current Port
ID status for the selected module. This command has
the following format: ID<cr>. When a user sends the
ID command, a status message similar to the following
is sent:
Unit 01, Module 02 Port I.D
Port 1=01:02,1
Port 2=01:02,2
Port 3=01:02,3
Port 4=01:02,4
This message is sent for an I/O module installed in Unit
1 as Module 2 using the default Port ID settings.
15.2.5 BROADCAST MODE
The 4-port peripheral communications modules (e.g.,
V74) supports a "broadcast" mode where any data
received by the V71 host module is sent out all four
ports of the selected module(s) simultaneously. A 4-
port serial module is placed into broadcast mode by
sending the port select code (default - $BT), capital "B",
the desired module number(s), and Carriage Return to
the V71 host module. To place all peripheral
communications modules into broadcast mode, send
$BTB<cr>.
If you wish to place multiple 4-port serial modules into
broadcast mode, each module number should be
separated by a comma. For example, to place three V74
modules installed as Module 2, Module 3, and Module 4
into broadcast mode using the default port select code,