Local Device - Mitsubishi Electric L02SCPU User's Manual And Reference

7.2

Local Device

The local device is a device that can be used independently for each program. Using local devices allows
programming of multiple independently-executed programs without considering other programs. Note that local device
data can be stored in the standard RAM only.
Ex. If M7000 and higher portion is set as a local device, it can be separately used for each program that is
executing M7000 and higher portion.
Program A
Program B
The following devices can be used as local devices.
• Internal relay (M)
• Data register (D)
After program execution, data in the local device file of the standard RAM are exchanged with the data in the device
memory of the CPU module. For this reason, the scan time increases by the time for data exchange.
Program
Local device
For
program A
For
program B
For
program C
● There are some instructions for which a local device cannot be specified. For details, refer to the pages describing
devices available for each instruction in the following manual.
MELSEC-Q/L Programming Manual (Common Instruction)
● For the concept of the number of words used for the local devices, refer to  Page 290, Section 5.2.
ON/OFF data of M7000
ON/OFF data of M7000
• Counter (C)
• Timer (T, ST)
Program A Program B
Restored Saved Restored
Local device
For
program A
For
program B
For
program C
CHAPTER 7 CONVENIENT USAGE OF DEVICES
Standard RAM
For program A
Internal relay
M7000 ON/OFF
For program B
Internal relay
ON/OFF
M7000
• Edge relay (V)
• Index register (Z)
Program C
Saved Restored
Local device
For
program A
For
program B
For
program C
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