User manual

Chapter 1
Overview
1-3
In the PLC-5/V40B, both channels (1 and 2) are identical although they are
independently configurable. In the PLC-5/V40L, channel 2 is a local I/O
(LIO) interface.
The PLC-5/VME processor has the same instruction set as the standard
PLC-5 processor. It supports:
complex expressions in compare and compute instructions
statistical instructions
floating-point calculations in PID instructions
ASCII string-handling instructions
main control programs (MCPs)
Use the keyswitch to change the mode in which a processor is operating.
If you want to: Turn the keyswitch to:
• Run your program, force I/O, and save your programs to a
disk drive. Outputs are enabled. (Equipment being
controlled by the I/O addressed in the ladder program begins
operation.)
• Enable outputs.
Note:
You cannot create or delete a program file, create or
delete data files, or change the modes of operation
through the programming software while in
run mode.
RUN
PROG
R
RUN
E
M
• Disable outputs
• Create, modify, and delete ladder files or data files;
download to an EEPROM module; and save/restore
programs.
Notes:
• The processor does not scan the program.
• You cannot change the mode of operation through
the programming software while in program mode.
PROG (program)
PROG
R
RUN
E
M
Change between remote program, remote test, and remote run
modes through the programming software.
Remote run
• Enable outputs.
• You can save/restore files and edit online.
Remote program
See the program-mode description above.
Remote test
• Execute ladder programs with outputs disabled.
• You cannot create or delete ladder programs or data files.
REM (remote)
PROG
R
RUN
E
M