Yaskawa Modbus TCP/IP Installation - Manual (Page 39)

7 Modbus TCP/IP Messaging
YASKAWA ELECTRIC TOBP C730600 57B 1000-Series Option SI-EM3 Installation Manual 39
◆
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.
■ Enter Commands
Table 9 Enter Command Types
Note: Because the EEPROM can be written to a maximum of 100,000 times, refrain from frequently
writing to the EEPROM. An Enter Command is not required if reference or broadcast data are
sent to the drive.
◆
Enter Command Settings
When replacing earlier Yaskawa drive models with a 1000 Series drive 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 1000 Series, set parameter H5-11 to 0.
• If upgrading from a V7 series drive to 1000 Series, set parameter H5-11 to 1.
■ H5-11 and the Enter Commands
Table 10 Enter Command Types
Register Number Description
0900H
Writes data into the EEPROM (non-volatile memory) of the drive and enables the data to
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. Parameters
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 is discarded.
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