Yaskawa YASNAC PC NC PLC Programming Manual - Manual (Page 157)

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YASNAC PCNC PLC Programming Manual Chapter 8: Online Editing
8.3.4 GO/STP (Run/Stop) Function
By using the [ GO/STP ] function soft-key , the sequence program execution (run, stop) can be con-
trolled. At the start of sequence program execution, correctness of the sequence program is
checked. During this check, the message “LADDER CHECKING” is displayed. If an error is
found during this check, the sequence program cannot be executed even if the [
GO/STP ] function
soft-key is depressed.The content of the error found during the check is displayed by the corre-
sponding warning message.
Note that the [ GO/STP ] function soft-key is not valid while the NC is running. After the start of
the sequence program, message is displayed on the screen.
Fig. 8.3
Before the execution of the sequence program, its correctness is checked.