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Startup Settings and Maintenance
Section 6-6
6-6-10 Flash Memory
This function is supported only by the CS1-H, CJ1-H, or CJ1M CPU Units.
With CS1-H, CJ1-H, or CJ1M CPU Units, the user program and parameters
are automatically backed up in flash memory whenever they are written to or
altered in the CPU Unit.
The following data is backed up automatically: User program, parameters
(including the PLC Setup, registered I/O tables, routing tables, and CPU Bus
Unit data, such as the data link tables).
The data is backed up automatically whenever the user program or parame-
ters are written in the CPU Unit, including for data transfer operations from the
CX-Programmer, writing data from a Programming Console, online editing,
data transfers from a Memory Card or EM file memory, etc.
The user program and parameter data written to flash memory is automati-
cally transferred to user memory in the CPU Unit at startup.
Note
1.
The BKUP indicator on the front of the CPU Unit will light while data is be-
ing written to flash memory. Do not turn OFF the power supply to the CPU
Unit until the backup operation has been completed (i.e., until the BKUP
indicator goes out) after transferring data from the a Programming Device
or file memory, or performing online editing.
2.
Only for online editing and only when there is a Battery in the CPU Unit,
the CPU Unit will restart in the previous condition (e.g., with the BKUP in-
dicator lit) even if the power supply is turned OFF before the backup oper-
ation has been completed, although up to 1 minute will be required will be
required to start the CPU Unit. Even in this case (and even if there is a Bat-
tery in the CPU Unit, always be sure that the backup operation has been
completed before turning OFF the power supply if the CPU Unit will be left
unpowered for an extended period of time.
CPU Unit
User memory
Automatic
backup
Flash memory
Automatically restored
when PLC is turned ON.
Parameters
User
program
Write operation
Data transfer from CX-
Programmer
Write from Programming
Console
Write from file memory
Online editing from CX-
Programmer
Summary of Contents for CJ1G-CPU series
Page 3: ...iv...
Page 5: ...vi...
Page 21: ...xxii Conformance to EC Directives 6...
Page 169: ...148 Task Control Instructions Section 3 32...
Page 203: ...182 Programming Device Operations for Tasks Section 4 4...
Page 253: ...232 Using File Memory Section 5 3...
Page 337: ...316 Other Functions Section 6 11...
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Page 381: ...360 Revision History...