Outline of Programming 3
3-1
3. Outline of Programming
3.1 Outline of programming
In the HPP, create a program by using the instruction list and manipulating the keyboard.
The destination to write a created program is different between the online mode and the offline mode.
In the online mode, a program is directly written to the program memory in the PLC. In the
offline mode, a program is written to the inbuilt HPP RAM.
When operating the PLC with a program created in the offline mode, the program should be
transferred from the HPP to the PLC.
While the PLC is in the RUN status, a program cannot be written or changed from the HPP.
Make sure to set the PLC to the STOP status, then write or change a program from the HPP.
3.2 Functions used in programming
[Read] ..........Reads a created program from the program memory, and displays it.
By specifying the step No., instruction, device or pointer, an arbitrary position of
the program can be displayed.
[Write] ...........Writes a new program or overwrites an existing program for modification or addition.
[Insert]..........Inserts an instruction to an existing program and carries down later step No’s.
[Delete] ........Deletes a specified instruction from an existing program and carries up later step
No’s.
An instruction or pointer can be deleted. Batch deletion and deletion of specified
ranges via the NOP instruction are also available.
• Press the [HELP] key during programming to display the valid program step range.
Press the [HELP] key again to reset the help display.
However, if the [HELP] key is pressed immediately after the [FNC] key, search of an
application instruction is started or interrupted.
FX-20P-E Handy programming panel
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