Functions And Operation Examples Of Extension File Registers - Mitsubishi Electric MELSEC-Q Structured Programming Manual

FXCPU Structured Programming Manual
[Device & Common]
2.9.6

Functions and operation examples of extension file registers

Extension file registers (ER) are usually used as log data storage destinations and set data storage
destinations.
Extension file registers can be handled only in dedicated instructions shown in the table below. When using
the contents of extension file registers in other instructions, transfer them to extension registers having the
same device numbers, and then use corresponding extension registers.
In FX /FX PLCs, extension file registers are available only while a memory cassette is attached.
3U 3UC
• FX /FX PLCs
3U 3UC
Instruction
LOADR
This (transfer) instruction reads the contents of extension file registers (ER)
This (transfer) instruction writes the contents of extension registers (R) to extension file registers (ER)
SAVER points (1 sector).
Use this instruction to store the contents of newly created 1 sector (2048 points) to extension file registers (ER)
This instruction initializes extension registers (R) and extension file registers (ER)
INITR
Use this instruction to initializes extension registers (R) and extension file registers (ER)
the LOGR instruction.
LOGR
This instruction logs specified data, and writes it to extension registers (R) and extension file registers (ER)
This (transfer) instruction writes the content of specified extension registers (R) to extension file registers (ER)
RWER supported in FX
Use this instruction to store the contents of arbitrary extension registers (R) to extension file registers (ER)
This instruction initializes extension file registers (ER)
INITER PLCs Ver. 1.30 or later.
Use this instruction to initialize extension file registers (ER)
*1. Extension file registers are accessible only while a memory cassette is attached.
• FX /FX PLCs
3G 3GC
Instruction
LOADR This (transfer) instruction reads the contents of extension file registers (ER) to extension registers (R).
This (transfer) instruction writes the contents of specified extension registers (R) to extension file registers (ER).
RWER
Use this instruction to store the contents of arbitrary extension registers (R) to extension file registers (ER)
*2. While a memory cassette is attached, extension file registers in the memory cassette are accessed.
While a memory cassette is not attached, extension file registers in the EEPROM built in the PLC are
accessed.
PLCs Ver. 1.30 or later.
3UC
2.9 Extension Register [R] and Extension File Register [ER]
Description
*1
to extension registers (R).
*1
in units of 2048 points (1 sector).
*1
*1
in units of 2048 points (1 sector), and is supported in FX
*1
before executing the SAVER instruction.
Description
2 Devices in Detail
*1
in units of 2048
*1
.
before starting to log data using
*1
.
*1
, and is
*1
.
3UC
*2
.
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