Hitachi SJ700D-004L, Instruction Manual

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Chapter 4 Explanation of Functions
4-140
(5) Enter command (storing the updates of register data)
Neither the command (06h) to write data to a register nor the command (10h) to write data to multiple registers can
store the updates they made in the internal memory of the inverter. Turning the inverter power off without storing the
updates deletes them and restores the original register settings. If you intend to store register updates in the internal
memory of the inverter, issue the Enter command as described below.
If you have updated a control constant, you must recalculate the motor constants. In such cases, use register "0900h"
for recalculation as described below.
How to issue the Enter command
With the command (06h) to write data to registers, write all register data to the internal memory. To recalculate the
motor constants, use the same command to write the data shown in the following table to register "0900h":
Data to be written Description
0000 Recalculating the motor constants
0001 Storing the register data
Other than the above Recalculating the motor constants and storing the register data
Notes:
- Execution of the Enter command requires considerable time. To check whether data writing is in progress, monitor
the status of the signal (coil No. 001Ah) that indicates whether data writing is in progress.
- The internal memory device of the inverter is subject to a limitation on the number of rewriting operations (about
100,000 times). Frequent use of the Enter command may shorten the inverter life.
Write EEPROM mode
- Inverter transfers the write EEPROM mode when the data “1” is written into holding resister of write EEPROM mode
with the command (06h) to write data to registers.
- After the inverter transfered the write EEPROM mode, the data changing with the command (06h) to write data to
registers is written into both volatile memory (RAM) and nonvolatile memory (EEPROM). The write EEPROM mode is
removed simultaneously.
- After the inverter transfered the write EEPROM mode, when the inverter recieve exclusive of the command (06h) to
write data to registers, the write EEPROM mode is removed.
* The difference between Enter command and Write EEPROM mode
Change parameter
Enter command
900h=1
All data are written
into EEPROM
Masater
SJ700D-3
Write RAM
Write RAM
Write RAM
Enter command
Master
SJ700D-3
Write EEPROM mode
Write EEPROM
mode is activated.
Changed data is
written into both
RAM and EEPROM.
The write EEPROM mode is available
only one command after transferring
the write EEPROM mode.
Change parameter
Change parameter
Change parameter
Change parameter
Write RAM