Owner`s manual

136
15.2.1 OPERATING IN FULL DUPLEX MODE
In full duplex mode, the V50/V73/V74/V75/V76/V86/V87
module provides full duplex communication between the
host module and the selected port. The host module
and the selected port remains connected until a
different port is selected or until the host module
disconnects from the module by sending the port select
code followed by Carriage Return. Data received by
non-selected peripheral devices is stored in the buffer
and sent to the host device when the port is selected.
The serial port module does not start loading data from
the new port into the host module until the new module
number, port number and terminating character are
received.
NOTE: The port select sequence has a ten second
timer. The timer starts when the first character of the
port select sequence is received. Any incomplete
sequence received ten seconds or more after the first
character has been received is treated as normal data
and is sent to the current selected port.
15.2.2 OPERATING IN IMMEDIATE
MESSAGE MODE
Immediate message mode provides automatic message
multiplexing between the designated host module and
all ports on the V50/V73/V74/V75/V76/V86/V87 module.
Messages are sent automatically to the designated
host computer in a round-robin fashion a message at a
time. For example, if two V74 modules installed as
Module 2 and Module 3 are sending messages from all
ports to the same designated host module, a message
from Module 2 Port 1 is sent to the designated host
module followed by a message from Module 3 Port 1