Allen-Bradley A-B QUALITY DL20 Series User Manual page 94

Chapter 8
Special Functions
Tape Operations
Before using the tape special functions, the recorder must be properly
connected and set up. Refer to Appendix B for instructions.
Note: Make sure that the ECHO ALL TO SLAVE special function is not
selected.
The first prompt on the Tape Operations menu is:
ABORT?
Answer Yes to return to EDIT?, otherwise you will see this prompt:
USE 1770-SB?
Answer Yes if you are using an Allen-Bradley Data Recorder or No if you
are using a STR-LINK II or III Data Recorder. If you are using an
Allen-Bradley Data Recorder, you will see this prompt:
USE 2706 KYBD?
Answer Yes if you are using a keyboard (Catalog No. 2706-NK1, -NK2).
When using a 2706 keyboard, you must press the return key to acknowledge
the prompts. If you answer No, the DL20 will assume that you are using a
terminal with an RS-232 port and prompt you to disconnect the terminal.
Writing Tapes
When writing a tape, all message data as well as system attributes are
transferred. In addition, special codes for verifying the data are also written
to the tape. The verify operation uses these codes to check the integrity of
the data.
Reading Tapes
Reading a tape overwrites all messages currently stored in the DL20. You
are prompted twice to make sure that important data is not lost:
SURE? N
and then
POSITIVE? N
If there is not adequate memory available or if the tape is read back with an
error, the following is displayed:
CANNOT READ TAPE
8–6