Rockwell Automation 1771-DB Basic Module User Manual - Series A - Manual (Page 47)

Operating Functions
Chapter 5
5–10
Action
taken: This command interrupts the scrolling of a BASIC
program
during the execution of a LIST command. It also stops
output from the receiving
port if you are running a program. In this
case XOFF (Control S) operates as follows:
1. XOFF only operates on PRINT statements.
2. When received during a PRINT,
data output and program execution
are suspended immediately.
3. When received at any other time,
program execution continues until a
PRINT is
encountered. At this time program execution is suspended.
4. XON (Control
Q) is required to resume program operation.
Action
taken: This command restarts a LIST command or PRINT output
that
is interrupted by a Control S.
Your BASIC Module
can execute and SAVE up to 255 programs in
an EPROM. The
module generates all of the timing signals
needed to program most
EPROM devices. The programs are stored
in sequence in the EPROM for
retrieval and execution. This sequential
storing of programs is
called the EPROM FILE. The following
commands allow
you to generate and manipulate the EPROM
FILE.
Action
taken: These two commands tell the the BASIC Module
interpreter whether to select the current program out of RAM or EPROM.
The
current program is displayed during a LIST command and
executed
when RUN is typed.
5.3.8
Command: Control S
5.3.9
Command: Control Q
5.3.10
Overview of EPROM File
Commands
5.3.11
Commands: RAM and ROM
[integer]