
APPENDIX 3 ERROR MESSAGES
3.1 Ladder Diagram Editing
Message
ILLEGAL OPERATION
Description and action to be taken
- Only the RETURN key was pressed.
- Address data input is incorrect.
EDIT BUFFER OVER
70LINE/l NET OVER
LARGE NET APPEARED
256STEP/l NET OVER
- Editing is not being performed within the limits
when creating function instructions.
- Function instructions cannot be created while the
cursor is on the right-hand side.
- Editing buffer was exceeded during net creation.
- Editing cannot be continued due to the large size of
nets being edited. Make nets smaller.
MNEMONIC BUFFER OVER
- Attempt was made to make a LADDER program of
more than 21,840 (24,000 when an EMS board is
used) steps.
SET COUNT OVER
INPUT INVALID
- Too many items in data table
- Non-numeric character(s) were specified for
[COPY], [INSLIN], ]C-UP], or [C-DOWN].
- Input address was specified in a coil.
- Data table contains invalid character(s).
ADDRESS BIT NOTHING
RELAY OR COIL NOTHING
HORIZONTAL LINE ILLEGAL
- Relay or coil address is not specified.
- Relay or coil is required.
- Horizontal lines in LADDER diagram are
unconnected.
VERTICAL LINE ILLEGAL
‘ARAMETER NOTHING
-ADDER ILLEGAL
ERROR NET FOUND
- Vertical lines in LADDER diagram are incorrect.
- Function instruction parameters have not been set.
- LADDER diagram is incorrect.
- Incorrect net found when [COPY][MOVE] was
specified.
- Error found on the screen during a search beyond
the screen.
3ELAY OR COIL FORBIT
‘LEASE COMPLETE NET
LLEGAL NETS CLEARED
ADDRESS BIT NOTHING
- Unnecessary relay or coil exists.
- An incorrect net was found.
- Net which did not match the specified level of the
stack was found and deleted from the LADDER
program which was read in.
- Specified address was not found during address
search.
-UNCTION NOT FOUND
- Specified function instruction was not found during
function instruction search.
A3-4