C.10 Enter Command; Enter Command Types; Enter Command Settings When Upgrading The Drive - YASKAWA A1000 Series Technical Manual

C.10 Enter Command

When writing parameters to the drive from the PLC using MEMOBUS/Modbus communication, parameter H5-11
determines if an Enter command must be issued to enable these parameters or not. This sections the types of Enter
commands and how they work.

◆ 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 only be written to. An error will occur if the user attempts to
read from these registers.
Register No.
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
0900H
supply is cycled.
0910H Writes data in the RAM only. Parameter changes are lost when the drive is shut off.
Note: 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.

◆ Enter Command Settings when Upgrading the Drive

When replacing earlier Yaskawa drive models with the A1000 and keeping the MEMOBUS/Modbus communications
settings, parameter H5-11 needs to be set in accordance with how the Enter command was set up 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 an A1000, set parameter H5-11 to 0.
• If upgrading from a V7 series drive to an A1000, set parameter H5-11 to 1.
■ H5-11 and the Enter Command
H5-11 Settings
Drive being replaced
How parameter settings are enabled
Upper/lower limit check
Default value of related parameters
Error handling when setting multiple
parameters
YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
Table C.6 Enter Command Types
H5-11 = 0
G7, F7
When the Enter command is received from the master.
Upper/lower limit check is performed, taking the settings of related
parameters into account.
Not affected. The settings of related parameters remain unchanged.
They must be changed manually if needed.
Data is accepted even if one setting is invalid. The invalid setting will
be discarded. No error message occurs.
Description
V7
As soon as the value is changed.
Checks only the upper/lower limits of the parameters that were
changed.
Default settings of related parameters are changed automatically.
Error occurs if only one setting is invalid. All data that was sent are
discarded.
C.10 Enter Command
H5-11 = 1
503
C