ProSoft Technology MVI56-BAS - Manual (Page 217)

MVI56-BAS ♦ ControlLogix Platform Reference
BASIC Module (DB/BAS Compatible) User Manual
ProSoft Technology, Inc. Page 217 of 234
December 13, 2011
11.2 Functional Overview
11.2.1 General Concepts
The following discussion explains several concepts that are important for
understanding module operation.
Module Power Up
On power up the module begins performing the following logical functions:

If the setup jumper is ON, the module powers up in command mode with
PRT1 designated as the program port at 19200 baud, no parity, eight bits per
character, one stop bit, and XON/XOFF flow control.
Else:

The program port is defined to be what ever port was designated via the last
PGMPRT command.

If there is a BASIC program stored in EPROM and PROG2 has previously
been executed, then start executing ROM1 program.
Else:

If there is a BASIC program in XRAM, then start executing the XRAM
program.
Else:

Go to the BASIC command prompt (command mode).
MVI56-BAS Ports Overview
The MVI56-BAS module uses three communication ports. These ports can
execute different tasks such as a program port, ASCII communication port, DH-
485 port, or DF1 port and can be used to allow access to the MVI56-BAS BASIC
programs.
DH-485
The DH-485 port has the following main functions:

DH-485 communications

BASIC program transfer