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ENTER Command
When writing parameters to the Inverter from the master using MEMOBUS communications the parameters
are temporarily stored in the parameter data area in the Inverter. To enable these parameters the ENTER com-
mand must be used.
There are two types of ENTER commands: ENTER commands that enable parameter data in RAM and
ENTER commands that write data into the EEPROM (non-volatile memory) in the Inverter at the same time
as enabling the data in RAM.
The following table shows the registers used for ENTER commands. The ENTER command is enabled by
writing 0 to register number 0900H or 0910H.
Communications Error Codes
The following table shows MEMOBUS communications error codes.
Register No. Contents
0900H Write parameter data to EEPROM, RAM is refreshed
0910H Parameter data are not written to EEPROM, but refreshed in RAM only.
IMPORTAN
The maximum number of times it can be written to EEPROM is 100,000. Do not frequently execute
ENTER commands (0900H) that write into EEPROM.
The ENTER command registers are write-only. Consequently, if these registers are read out, the
register address will become invalid (Error code: 02H).
Error Code Contents
01H
Function code error
A function code other than 03H, 08H, or 10H has been set by the master.
02H
Invalid register number error
• The register address can not be accessed.
• With broadcast sending, a start address other than 0001H, or 0002H has been set.
03H
Invalid quantity error
• The quantity of registers being read or written is outside the range of 1 to 16.
• In write mode, the number of data in the message is not quantity of registers x 2.
21H
Data setting error
• A upper limit or lower limit error has occurred in the control data or when writing parameters.
• When writing parameters, the parameter setting out of the setting range
22H
Write mode error
• Attempting to write parameters to the Inverter during operation.
• Attempting to send an ENTER command during operation.
• Attempting to write parameters other than A1-00 to A1-05, E1-03, or o2-04 when warning alarm
CPF03 (defective EEPROM) has occurred.
• Attempting to write read-only data.
23H
Writing during DC bus undervoltage (UV) error
• Writing parameters to the inverter during UV (DC bus undervoltage) alarm.
• Sending ENTER commands during UV (DC bus undervoltage) alarm.
24H
Writing error during parameters processing.
Attempting to write parameters while other parameters in the Inverter are processed.
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