Rockwell Automation 1772-L8_LW_LWP_LX_LXP,D17726.5.8 User Manual - Manual (Page 32)

Hardware Features
Chapter 3
3-6
PROG – You can enter and edit your program from the 1770-T3 industrial
terminal. User program and I/O are not scanned when the switch is in this
position and outputs are disabled. You cannot change to another mode of
operation with the 1770-T3 terminal when the switch is in this position.
R/P – When your key switch is in this position, the processor can be
programmed for any one of three modes of operation.
Run/Program – Change your key switch from PROG through R/P to
RUN and back to R/P or, using the 1770-T3 terminal, press the key
sequence SEARCH 590. In this mode, your program is continuously
scanned and executed. You can:
- make on-line changes to the data table
- force instructions
- make on-line programming changes
- select remote mode of operation
Remote Program – Change your key switch from PROG to RP or, using
a 1770-T3 terminal, press the key sequence SEARCH 592. In
this mode:
- you can enter and edit a program.
- the processor stops scanning and executing its stored program and
waits for commands from the programmer.
Remote Test – Use this mode to test your program.
Using a 1770-T3 terminal, press the key sequence SEARCH 591.
1. program is executed
2. inputs are scanned
3. outputs are disabled
RUN – The processor scans and executes your program. You cannot
change to another mode of operation with the 1770-T3 terminal when the
switch is in this position nor can you alter the program or change any data.
MEM STORE – The processor will load your program to be backed up by
EEPROM when you switch to this position, then to PROG, then back to
the MEM STORE position within one second.
Battery Backup
Memory contents may be lost when the processor loses power. A battery
in the processor guards against loss of data. The battery holder accepts a
AA lithium battery (cat. no. 1770-XZ).