237
Errors and Alarm Troubleshooting Section 7-1
80 Step Ladder Pro-
gram command
error
There is an irrelevant com-
mand in the Step Ladder Pro-
gram, or the method of use of
commands is wrong, for
example, there is an AND
command even though there
is no input command.
The command in question
and onwards are not exe-
cuted.
Check the program within the
Step Ladder Program block.
Sequence table
command error
The condition signal type reg-
istered in the conditions is
incorrect.
The rule setting is not set to
Y, N, or blank.
The action signal type regis-
tered in the action section is
incorrect.
The sequence table will not
be executed.
Correct the sequence table
program.
81 Step Ladder Pro-
gram source/des-
ignation not
defined
Either the function block is
not registered to the block
address currently specified
by each command in the
Step Ladder Program, or the
ITEM number does not exist.
The command in question
and onwards are not exe-
cuted.
Check the block address and
ITEM number.
Sequence Table
source/designa-
tion not defined
Either the ITEM number of
the function block specified
as an input source or output
destination in the sequence
table does not exist.
The output destination of the
signal registered in the condi-
tion signal is incorrect.
The timer/counter signal reg-
istered in the sequence table
is incorrect.
The expansion block address
registered in the sequence
table is incorrect.
The sequence table will not
be executed.
Correct the sequence table
program.
The block specified in the
TBL command is not set to
the reference table.
The sequence table using the
TBL command will not be
executed.
Check the sequence table at
the reference destination and
change the reference table
setting.
Sequence Table
step/stop com-
mand block error
The block address of the cur-
rent block is specified in the
STEP or STOP command in
a sequence table.
The sequence table will not
be executed.
Specify a different block.
The block set in the reference
table is specified in the STEP
command in a sequence
table.
The sequence table executed
by the STEP command will
stop operation.
Correct the block specified in
the STEP command to the
setting for the host table.
89 Overuse of Step
Ladder Program
differentiated
instruction
The number of differentiated
instructions to be simulta-
neously executed has
exceeded 256.
Differentiated instructions
exceeding 256 instructions
are not executed.
Reduce the number of differ-
entiated instructions to be
executed simultaneously.
99 Database error There was a database error
in the Step Data blocks
(Block Model 601), Bank
Data blocks (Block Model
602), and Segment Program
3 block (Block Model 158)
when the Segment Program
3 block was executed.
Execution of the Segment
Program 3 block stops.
Executed the Clear all,
Download, or Recovery oper-
ation from the CX-Process
Tool, or reset the Segment
Program 3 block.
Code Description Explanation Operation at error Remedy
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