Panasonic FP-XH M8N16PD, User Manual

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Memory /Master Memory Cassette
21-2
21.1 Memory Backup
21.1.1 Program Memory Backup
The contents downloaded to the control unit can be saved even in case of power outage.

Program Memory Backup
Type Remarks
Program
Comments Maximum 200KB I/O comments, description, comments between the lines
System register
Positioning data Contains positioning parameters and positioning table data set by the Configurator PM7.
21.1.2 Operation Memory Backup
• The operation memory includes outage hold and non-hold area.
• In the FP-XH M8N Control unit, backup fixed area in case of a power outage or mode
switching (RU N → PROG.).

Non-hold and hold area
Type Description
Non-hold area
In case of a power outage or mode switching (RUN → PROG.), the data content is reset
to 0.
Hold area
In case of a power outage or mode switching (RUN → PROG.), maintain the previous
operational data.

Automatic backup in case of an outage
Type Hold Area
Counter 16 points C1008 - C1023
Counter elapsed
value area
16 words EV1008 - EV1023 (note 1)
Internal relay
128
points
R5040-R511F
Data register
315
words
(Note 2)
DT11970 - DT12284 (When 40k step program capacity is
selected)
DT32450 - DT32764 (When 32k step program capacity is
selected)
DT65218 - DT65532 (When 12k step program capacity is
selected)
(Note 1): You can not hold counter target value area SV.
(Note 2): The data register range varies from the system register No.0 internal relay capacity setting.

Backup based on user program P13 (ICWT) instruction
Type Description
How to use
The user program allows you to write P13 (ICWT) instruction and transfer the data
register to the F-ROM area. Specifies the continuous range for using the 2K words as 1
memory block. Read from the F-ROM area to the data register by F12 (ICRD) instruction.
No. of times of
writing
Less than 10 thousand times