User guide

Appendix A
HHT Messages and Error Definitions
A–6
Message: Respond by:Appears when:
PASSWORD NOT
CHANGED
The password or master password currently protecting the
ladder program or processor has not been entered correctly.
You must enter the old password before changing it.
Entering the current password correctly.
POSITION IS
TOO LARGE
The position parameter entered is larger than the data file
indicated.
Correcting the position value.
PROCESSOR
FILES
CORRUPTED
The HHT is unable to read or monitor the ladder program
stored in the processor.
Downloading an uncorrupted ladder program to the processor
then uploading that program to the HHT.
PROCESSOR
PROGRAM
INCOMPATIBLE
The processor ladder program was either programmed by a
non–HHT compatible programmer or contains non–HHT
compatible instructions for branching.
Aborting the procedure.
PROC PROGRAM
IS LOCKED
The future access bit in the processor ladder program is set.
This denies monitoring the program.
Aborting the procedure, downloading an unprotected program,
or clearing memory.
PROGRAM FILES
DIFFER
The ladder program in the processor does not match the
program in the HHT.
Uploading or downloading the appropriate ladder program.
Important: The program which is overwritten will be lost.
RACK CANNOT
BE MODIFIED
The slot size of this rack cannot be modified because a higher
numbered rack exists.
Aborting the procedure or deleting higher numbered racks,
modifying this rack, then re–configuring the higher numbered
racks.
RACK MUST
CONTAIN A SLOT
A rack that must have one slot configured for the processor in
slot 0 is not configured correctly.
Configuring the slot.
RESET (RST)
USED ON A
TIMER
OFF–DELAY
(TOF)
A reset (RST) instruction has been used to reset a Timer Off
Delay instruction (TOF). You cannot use a RST to reset a
TOF.
Remove the RST instruction.
ROM TEST
FAILED – FATAL
ERROR
The memory pak of the HHT has failed. The HHT is
inoperable.
Replacing the memory pak.
RUNG HAS NO
OUTPUT
INSTRUCTION
You attempt to accept a rung without instructions. A ladder
rung must contain at least one output instruction to be
accepted.
Entering output instructions or aborting the rung edit.
RUNG HAS NO
OUTPUT
INSTRUCTION
The rung you are editing does not contain an output
instruction. Each rung must contain at least one output
instruction.
Entering an output instruction.
RUNG HAS
SHORTED
OUTPUT
The rung you are editing contains a branch around an output
that does not contain its own output instruction. Any branch
around an output must contain at least one output instruction.
Entering an output instruction within the branch.
RUNG TOO
LARGE
You have reached the limit of instructions and/or branches
allowed on one rung. There are 127 instructions allowed per
rung.
Using storage bits and programming a separate rung for the
additional instructions and/or branches.
SERIAL LINK
DOWN
The communication link between the HHT and the processor
is not functioning.
Checking power and communication connections to the HHT
and processor.
SUBROUTINE
(SBR) OR LABEL
(LBL) ALREADY
EXISTS
A subroutine or label instruction having this number already
exists in this ladder program.
Choosing a different label or subroutine number.
SUBROUTINE
FILE IS INVALID
TYPE
The file accessed in a subroutine (SBR) instruction is not a
ladder file.
Changing the number in the SBR instruction.