Omron CJ - PROGRAMMING MANUAL 08-2008 Programming Manual page 400

Trial Operation and Debugging
Precautions
Online Editing from CX-Programmer
1,2,3...
!Caution Proceed with Online Editing only after verifying that the extended cycle time
362
When using a pre-EV1 CS1 CPU Unit, the size of the task that is being edited
will determine the length of time that a program will be stopped for online edit-
ing. By splitting the program into smaller tasks, the amount of time that the
cycle is extended will be shorter using the Online Editing function than with
previous PLC models.
The cycle time will be longer than normal when a program is overwritten using
Online Editing in MONITOR mode, so make sure that the amount of time that
it is extended will not exceed the cycle monitoring time set in the PLC Setup. If
it does exceed the monitoring time, then a Cycle Time Over error will occur,
and the CPU Unit will stop. Restart the CPU Unit by selecting PROGRAM
mode first before changing to RUN or MONITOR mode.
Note If the task being edited online contains a block program, then standby status
created by WAIT(805), TIMW(813), TIMWX(816), CNTW(814), CNTWX(817),
TMHW(815), or TMHWX(818) will be cleared by BPPS, and the next execu-
tion will be from the beginning.
1. Display the program section that will be edited.
2. Select the instructions to be edited.
3. Select Program, Online Edit, and then Begin.
4. Edit the instructions.
5. Select Program, Online Edit, and then Send Changes The instructions
will be check and, if there are no errors, they will be transferred to the CPU
Unit. The instructions in the CPU Unit will be overwritten and cycle time will
be increased at this time.
will not affect operation. Input signals may not be input if the cycle time is too
long.
Temporarily Disabling Online Editing
It is possible to disable online editing for a cycle to ensure response charac-
teristics for machine control in that cycle. Online editing from the Program-
ming Device will be disabled for one cycle and any requests for online editing
received during that cycle will be held until the next cycle.
Online editing is disabled by turning ON the Online Editing Disable Bit
(A52709) and setting the Online Editing Disable Bit Validator (A52700 to
A52707) to 5A. When these settings have been made and a request for online
editing is received, online editing will be put on standby and the Online Editing
Wait Flag (A20110) will be turned ON.
When the Online Editing Disable Bit (A52709) is turned OFF, online editing
will be performed, the Online Editing Processing Flag (A20111) will turn ON,
and the Online Editing Wait Flag (A20110) will turn OFF. When online editing
has been completed, the Online Editing Processing Flag (A20111) will turn
OFF.
Online editing can also be temporarily disabled by turning ON the Online Edit-
ing Disable Bit (A52709) while online editing is being performed. Here too, the
Online Editing Wait Flag (A20110) will turn ON.
If a second request for online editing is received while the first request is on
standby, the second request will not be recorded and an error will occur.
Online editing can also be disabled to prevent accidental online editing. As
described above, disable online editing by turning ON the Online Editing Dis-
Section 7-2