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YASKAWA ELECTRIC
SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
C.11 Enter Command
C.11 Enter Command
When writing parameters to the drive from the PLC using MEMOBUS/Modbus communication it depends on the setting
of parameter H5-11 if an Enter command must be used to enable these parameters or not. This sections explains Enter
commands.
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Enter Command Types
The drive supports two types of Enter commands as shown in the table below. An Enter command is enabled by writing
0 to register number 0900H or 0910H. These registers can be written to only. An error will occur if the user attempts to
read from these registers.
Table C.6 Enter Command Types
Note: 1.
Because the EEPROM can be written to a maximum of 100,000 times, refrain from writing to the EEPROM too often. The Enter
command registers are write-only. Consequently, if these registers are read, then the register address will be invalid (Error code:
02H). An Enter command is not required if reference or broadcast data are sent to the drive.
2.
Parameter data cannot be written to EEPROM during undervoltage (Uv), even when using 0900H.
3.
If undervoltage Uv occurs when making several parameter changes issued with a single ENTER command, the writing process may
be aborted before all of the new changes have been written. Because all of the data has not yet been written, the EEPROM data error
CPF06 will be displayed the next time power to the drive is cycled. To prevent this problem, wait about 5 seconds after issuing the
ENTER command before shutting off drive power.
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Enter Command Settings when Upgrading the Drive
When replacing earlier Yaskawa drive models with T1000V and keeping the MEMOBUS/Modbus communications
settings, parameter H5-11 needs to be set in accordance with how the Enter command functions in the older drive. H5-11
determines if an Enter command is needed or not in order to activate parameter changes in the drive.
• If upgrading from a G7 or F7 series drive to T1000V, set parameter H5-11 to 0.
• If upgrading from a V7 series drive to T1000V, set parameter H5-11 to 1.
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H5-11 and the Enter Command
Register No.
Description
0900H
Writes data into the EEPROM (non-volatile memory) of the drive and enables the data in RAM at the same time. Parameter
changes remain even if the power supply is cycled.
0910H
Writes data in the RAM only. Parameter changes are lost when the drive is shut off.
H5-11 Settings
H5-11 = 0
H5-11 = 1
Drive being replaced
G7, F7
V7
How parameter settings are
enabled
When the Enter command is received from the master. As soon as the value is changed.
Upper/lower limit check
Upper/lower limit check is performed taking the
settings of related parameters into account.
The upper/lower limit of the changed parameter is
checked only.
Default value of related
parameters
Not affected. The settings of related parameters remain
unchanged. They must be changed manually if needed.
The default settings of related parameters are changed
automatically.
Error handling when setting
multiple parameters
Data is accepted even if one setting is invalid. The
invalid setting will be discarded. No error message
occurs.
Error occurs if only one setting is invalid. All data sent
are discarded.
