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13. COMMUNICATION FUNCTION
(6) Parameter write
POINT
If setting values need to be changed with a high frequency (i.e. one time or more
per one hour), write the setting values to the RAM, not the EEP-ROM. The EEP-
ROM has a limitation in the number of write times and exceeding this limitation
causes the servo amplifier to malfunction. Note that the number of write times to
the EEP-ROM is limited to approximately 100, 000.
Write the parameter setting into EEP-ROM of the servo amplifier. Specify the parameter group in advance
(refer to (1) in this section).
Write the value within the setting enabled range. For the setting enabled range, refer to chapter 5 or read
the setting range by performing operation in (3) in this section.
Transmit command [8][4], the data No. , and the set data.
The data No. is expressed in hexadecimal. The decimal equivalent of the data No. value corresponds to the
parameter number.
When the data to be written is handled as decimal, the decimal point position must be specified. If it is not
specified, data cannot be written. When the data is handled as hexadecimal, specify 0 as the decimal point
position.
Write the data after making sure that it is within the upper/lower limit value range.
Read the parameter data to be written, confirm the decimal point position, and create transmission data to
prevent error occurrence. On completion of write, read the same parameter data to verify that data has
been written correctly.
Command Data No. Set data
[8][4] [0][0] to
[F][F]
See below.
Data is transferred in hexadecimal.
Decimal point position
0: No decimal point
1: Lower first digit
2: Lower second digit
3: Lower third digit
4: Lower forth digit
5: Lower fifth digit
Write mode
0: Write to EEP-ROM
3: Write to RAM
When the parameter data is changed frequently through communication,
set "3" to the write mode to change only the RAM data in the servo amplifier.
When changing data frequently (once or more within one hour),
do not write it to the EEP-ROM.