Owner`s manual

M SERIES DAC
BASE UNIT AND MODULE OPERATION
____________________________________________________________________________
141
If a peripheral communications module is configured to operate in immediate
reporting mode and the destination host module places that module into broadcast
mode, the destination host module can receive data or messages from the peripheral
ports while simultaneously broadcasting data out to the ports.
While in broadcast mode, other host modules can connect to the I/O module(s) and
issue data commands if the module(s) are in command reporting mode. The clear
buffer command can be issued to any 4-port serial module in broadcast mode by
another host module regardless of the programmed reporting mode.
DATA/MESSAGE PRESENTATION
Data presentation varies slightly in format depending on the reporting mode you are
using. In full duplex mode, data is presented to the host computer and selected
peripheral exactly as it is transmitted and/or received (i.e., the V74/V75/V87 module
does not add any extra characters).
In immediate reporting mode, messages are sent to the designated host computer with
an optional port identification code preceding the actual message. For example,
suppose the 4-port serial module is installed in Unit 1 as Module 2, Port ID is
enabled, <cr> is the programmed message terminate character, and time tag is
enabled. The 4-port serial module sends complete messages to the designated host
computer which appears similar to the following:
01:02,1 06/16/98 15:55:30 MESSAGE FROM PORT 1<cr>
01:02,2 06/16/98 15:55:30 MESSAGE FROM PORT 2<cr>
01:02,3 06/16/984 15:55:30 MESSAGE FROM PORT 3<cr>
01:02,4 06/16/98 15:55:30 MESSAGE FROM PORT 4<cr>
where 01:02,x represents Unit 1/Module 2/Port x, 06/16/94 15:55:30 is the time tag
indicating that the message was recorded on June 16, 1998 at 3:55:30 pm, and
MESSAGE FROM PORT x<cr> is the actual message (x = 1 to 4). If you are in
command reporting mode and request a single message or all messages from Port x,
you will receive a single message or all messages that appear in a format similar to
that shown above. The Port ID can also consist of the device name of the port.
If you are operating in command reporting mode and issue the RBn<cr> command,
the I/O module sends all buffered data from the requested port(s) with each data block
preceded by the Unit#:Module#,Port# or device name. Only data buffered at the time
the RBn<cr> command is issued is sent to the host computer. Data received after the
RBn<cr> command has been issued is buffered and requires another command to be
sent to the host computer.