ProSoft Technology 5201-DFNT-ASCII - Manual (Page 13)

Modes of Operation ASCII ♦ ProLinx Standalone
Generic ASCII Serial Communication Module
ProSoft Technology, Inc. Page 13 of 40
July 7, 2008
3 Modes of Operation
In This Chapter
™ Data Flow .............................................................................................. 13
™ Termination of Received Data ............................................................... 15
The module can operate in several different modes with each port acting
independently. The configuration of each port's driver determines its mode. The
following topics describe these modes.
3.1 Data Flow
The following topics describe the flow of data between the pieces of hardware
(ASCII device and ProLinx Module). Each application port on the module is
configured independently to interface with serial communication devices. The
sub-sections that follow describe the three possible types of communication
devices that can be attached to application ports: receive-only, transmit-only, and
transmit-receive mode.
3.1.1 Receive-Only Mode
A port on the module configured to function in receive-only mode is set up to only
receive data from some sort of ASCII device. In this mode, the ProLinx module
will never transmit data back to the ASCII device. Any data received from the
ASCII device is passed from the receiver driver (Rx Driver) to the ProLinx
module's internal database (Rx Data). The following illustration shows the flow of
data on a port configured for receive-only mode.