Omron CPM1A operation manual Clearing Memory, All Clear, Partial Clear

Programming Console OperationsSection 4-3

4-3-2	Clearing Memory
		This operation is used to clear all or part of the Program Memory and data areas,
		as well as the contents of the Programming Console’s memory. This operation is
		possible in PROGRAM mode only.
		RUN	MONITOR	PROGRAM
		No	No	OK
		Before beginning to program for the first time or when installing a new program,
		clear all areas.
All Clear		The following procedure is used to clear memory completely, including the pro-
		gram, all data areas, counter PVs, Data Memory, and the PC Setup (DM 6600 to
		DM 6655).

1, 2, 3... 1. Bring up the initial display by pressing the CLR Key repeatedly.

2. Press the SET, NOT, and then the RESET Key to begin the operation.

SET NOT RESET

00000MEMORY CLR?

HR CNT DM

3. Press the MONTR Key to clear memory completely.

MONTR

00000MEMORY CLR END HR CNT DM

!Caution The PC Setup (DM 6600 through DM 6655) will be cleared when this operation is performed.

Partial Clear	It is possible to retain the data in specified areas or part of the Program Memory.
	To retain the data in the HR, TC, or DM Areas, press the appropriate key after
	pressing SET, NOT, and RESET. Any data area that still appears on the display
	will be cleared when the MONTR Key is pressed.
	The HR Key is used to specify both the AR and HR Areas, the CNT Key is used to
	specify the entire timer/counter area, and the DM Key is used to specify the DM
	Area.
	It is also possible to retain a portion of the Program Memory from the first
	memory address to a specified address. After designating the data areas to
	be retained, specify the first Program Memory address to be cleared. For
	example, input 030 to leave addresses 000 to 029 untouched, but to clear
	addresses from 030 to the end of Program Memory.
	As an example, follow the procedure below to retain the timer/counter area and
	Program Memory addresses 000 through 122:

1, 2, 3... 1. Press the CLR Key to bring up the initial display.

2.Press the SET, NOT, and then the RESET Key to begin the operation.

3.Press the CNT Key to remove the timer/counter area from the data areas shown on the display. (Counter PVs will not be cleared.)

	00000MEMORY	CLR?
CNT	HR	DM

4. Press 123 to specify 123 as the starting program address.

B C D 00123MEMORY CLR?

1 2 3 HR DM

5. Press the MONTR Key to clear the specified regions of memory.

MONTR

00000MEMORY	CLR
END HR	DM

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