Rockwell Automation 1771-DB Basic Module User Manual - Series A - Manual (Page 99)

Operating Functions
Chapter 5
5–62
Press PLAY. Tape movement begins and the recorder searches for the
beginning of the next program. As each line of the program verifies, an
asterisk displays.
During this time the “DATA OUT” LED on the recorder and the
“RECV” LED on the module illuminate. When the last line of program
is verified a final asterisk is displayed on the terminal followed by the
“VERIFICATION COMPLETE” message and the BASIC (
u) prompt.
If any differences between programs are encountered, the routine
displays an “ERROR–VERIFICATION FAILURE” message and the
BASIC (
u) prompt is immediately displayed.
Important: Maximum baud rate is 2400 bps for all data recorder CALL
routines. The UART is set up in these routines and does not need setting in
BASIC. See section 4.2.2.2 for required cable connections.
This routine loads a program stored on a 1770–SA/SB recorder into user
RAM, destroying the previous contents of RAM. To use this routine:
enter CALL 34. The terminal responds with “POSITION TAPE AND
PRESS READ FROM TAPE”.
Press PLAY. Tape movement begins and the routine searches for the
beginning of the next program. When the program is found an asterisk is
printed for each line read from the recorder.
During this time the “DATA OUT” LED of the recorder and the “RECV”
LED on the front of the module illuminate. When the recorder sends the
last line of program, a final asterisk appears on the terminal indicating that
the load operation is complete. Tape motion ceases and the BASIC prompt
(
u) appears.
If you are using a 1770–SA Recorder, press STOP.
Important: This routine loads the first program encountered and does not
distinguish between labelled programs. See section 5.8.10 below titled,
“Load Labeled Program from Data Recorder (1770–SB only) CALL 39
″
for an explanation of labelled programs.
5.8.4
Verify Program with Data
Recorder – CALL 33
(continued)
5.8.5
Load Program from Data
Recorder – CALL 34