Instruction manual

8・25
Chapter 8 Monitor (Edit Program while Monitoring)
You can edit program of the PC while monitoring. You can modify the part of a program of the PC
faster by using this function, it is useful, for example, at the time of debug during the test running.
[1] Change address or values specified
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● Operation order (Example)
1. Activate the [Program：Ladder] window.
2. Read program memory from the PC by the [PC Transfer]-[Read] command.
You can also write program created at JW-100SP to the program memory of the PC by the
[PC Transfer]-[Write] command.
3. Execute ladder monitor by the [Monitor]-[Start Monitoring] command.
4. After moving the cell cursor to the contact whose relay number is to be modified, or to the coil ,
press [Enter] key to make it to the address input mode.
5. If you press [Enter] key after inputting the relay number that is to be modified, the modification
of the relay number will be completed.
8-5 Edit Program while Monitoring (Program)
Change 00000 to 00002
Ladder Monitor Mnemonic Monitor
Change address or
values specified
Transfer PC
(Program)
Write
Edit Circuit
Possible
Possible
Possible
Impossible
Impossible
Possible
Possible
Impossible
Possible
Impossible
PC Stopping PC Running PC RunningPC Stopping
Read
※ ※
※ ※
Impossible Impossible
Edit Circuit
W16/W51/W100
W70 H/W100H
JW series
Change address or
values specified
Edit Circuit
Possible Possible
Possible
Impossible*
Model name
sa
Special precautions
Do not modify the program for a PLC that is controlling equipment which can directly cause damage to
property or adversely affect human life.
Do not modify the program while operating if the scan time is longer than 100 mS.
(In some circuit editing conditions the control module may temporarily halt operation.)
Review the circuit and the address where you will insert a program step thoroughly. Simulate the
operation of the new program using another device before making the actual change.
・
・
・
Due to limited processing capacity, the W16/W51/W100 series may stop operating if you try
to modify the circuits during operation. Therefore, these models do not allow circuit modifica-
tion during operation.
*
※ "Change address or values specified" and "Edit Circuit" at the ladder monitor.
・You can modify the contact and the coil relay number of the PC program while monitoring.
・It can be executed at the [Program：Ladder] window.
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Precautions for editing circuits during operation Precautions for editing circuits during operation
Precautions for editing circuits during operation Precautions for editing circuits during operation
Precautions for editing circuits during operation
Modifying the circuits of a PLC while it is operating may cause serious accidents involving the
machines or facilities which are controlled by this PLC due to missing program steps or
inappropriate operation. Please be extremely careful when the PLC is operating.