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Message Meaning and appropriate response
SBS UNDEFD A defined subroutine is not called by the main program. When this message is displayed because
of interrupt routine definition, there is no problem. In all other cases, correct the program.
STEP OVER STEP is used for more than 16 program sections. Correct the program to decrease the number of
sections to 16 or less. When the GPC is used the message “CPU WAITG” is displayed.
SNXT OVER More than 48 SNTXs are used in the program. Correct the program to decrease the number to 48
or less.
STEP ERR STEP and SNXT are not correctly used. Correct the program.
The following examples shows some of the displays that can appear as a
result of a program check.
Display #1
Display
#2
Display
#3
Halts program check
Check continues until END(01)
When errors are found
0128PROG CHKEND
1150PROG CHK
END (01)
0178CIRCUIT ERR
OUT 0200
0196COIL DUPL
OUT 0500
0200IL-ILC ERR
ILC (03)
1193NO ENDINSTR
END
0000
0064PROG CHK
4-6-4 Displaying the Cycle Time
Once the program has been cleared of syntax errors, the cycle time should
be checked. This is possible only in RUN or MONITOR mode while the pro-
gram is being executed. See
Section 6 Program Execution Timing
for details
on the cycle time.
To display the current average cycle time, press CLR then MONTR. The time
displayed by this operation is an average cycle time. The differences in dis-
played values depend on the execution conditions that exist when MONTR is
pressed.
Note Cycle time is displayed as scan time.
Example
Inputting, Modifying, and Checking the Program Section 4-6