Cautions when writing in run mode – KEYENCE KV Series User Manual
Page 7
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Cautions when writing in RUN mode
•
In the Visual KV Series, a program can be changed using the ladder sup-
port software "LADDER BUILDER for KV" even while the program is run-
ning.
•
Pay strict attention to safety when performing any writes in RUN mode.
•
The situation may become extremely dangerous depending on the status of
the controller device connected to the PLC or the program used.
When writing in RUN mode, each function is offered as follows:
Note 1: When a ladder program is changed while it is running, it is not saved in the
EEPROM but is saved in the SRAM, then will be saved in the EEPROM when the
power is next turned on. If the power OFF period is 2 months or longer at 25°C (20
days or longer at 25°C for the KV-10xx) after a ladder program is changed in RUN
mode, the changed ladder program may become corrupted. To prevent inconsisten-
cies, turn on the power once so that the changed program is saved in the EEPROM.
Note 2: If an error occurs in the Visual KV Series basic unit while a program is being
written in RUN mode, the Visual KV Series basic unit changes to PROGRAM mode
and the existing program which is being written may be deleted. In such a case,
transfer the program again.
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KVNKA Front_Soft.p65
08.3.11, 11:24 AM
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