ProSoft Technology 5201-DFNT-ASCII - Manual (Page 14)

ASCII ♦ ProLinx Standalone Modes of Operation
Generic ASCII Serial Communication Module
Page 14 of 40 ProSoft Technology, Inc.
July 7, 2008
Configuring the Port for Receive-Only Mode
In order to set a port for Receive-Only mode, ensure that the Rx DB Start
parameter in the configuration file contains the starting location of where the data
will be stored. The Tx DB Start parameter must contain a value of -1. This value
indicates that the port will not transmit any data.
3.1.2 Transmit-Only Mode
A port on the module configured to function in transmit-only mode is set up to
only transmit data from the ProLinx module's internal database (received from an
external source) to an ASCII device. When the transmit driver (Tx Driver)
recognizes a new write block containing data (data placed in the module's
internal database), it transmits this data out to the port. The sequence number
used in the block will be different that that of the previous block, and therefore,
signals that the packet is fully assembled and ready to send. The following
illustration shows data flow for a transmit-only device.
Configuring a Port for Transmit-Only Mode
In order to set a port for Transmit-Only mode, ensure that the Tx DB Start
parameter in the configuration file contains the starting location of where the data
will be stored. The Rx DB Start parameter must contain a value of -1. This value
indicates that the port will not receive any data.