52
YASKAWA ELECTRIC
SIEP C730600 64A 1000-Series Option SI-ES3 Technical Manual
11 Drive Parameter, Monitor and Control Register Access
11
Drive Parameter, Monitor and Control Register Access
All drive parameters, monitors, and other control registers are represented by their MEMOBUS/Modbus register. The
registers can be read or written by accessing these registers through the option.
MEMOBUS/Modbus registers can be directly read or written using MEMOBUS/Modbus read/write commands. The
registers can also be mapped to the content of a manufacturer specific object and then be accessed by reading from or
writing to this object. Refer to
Selecting the Object Content on page 45
for details on object content selection.
When writing drive parameters, certain precautions concerning message timing must be taken into account.
• The drive requires a certain time to activate changes to parameter values. When changing multiple parameters, make
sure to add a wait time between write requests.
• If an ENTER command is issued, make sure to add a wait time between the ENTER command and the next message.
Refer to the drive technical manual for information about MEMOBUS/Modbus addresses available in the drive and the
wait times required between parameter write requests and ENTER commands.
Drive Parameter and Monitor Access by MEMOBUS/Modbus Read/Write
Commands
Reading a Drive Register, Parameter or Monitor
Reading a drive parameter, monitor or control register using a MEMOBUS/Modbus read command requires the
following steps:
• Write the address of the drive MEMOBUS/Modbus register to be read to subindex 1 of object 2040 (Hex).
• Read the value of the drive MEMOBUS/Modbus register from the MEMOBUS/Modbus read response in subindex 1
of object 2140 (Hex).
Objects 2040 (Hex) and 2140 (Hex) can both be mapped to PDOs.
Writing a Drive Parameter or Drive Control Register
Writing a drive parameter or drive control register can be performed by following the steps below:
• Write the value and the MEMOBUS/Modbus address of the drive parameter or control register to subindex 1 of object
2050 (Hex).
• Read the MEMOBUS/Modbus write response from subindex 1 of object 2150 (Hex) in order to verify that the item is
written correctly.
If drive parameters are written and parameter H5-11 in the drive is set to 0, a RAM ENTER command (object 2060
(Hex)) must also be issued in order let the change take effect. To store the parameter change in the non-volatile memory
of the drive, a ROM ENTER command (object 2070 (Hex)) must be issued instead. An ENTER command can be issued
by performing the steps below.
• Write “save” (73H + 61H + 76H + 65H) to subindex 1 of object 2060 (Hex) for a RAM ENTER command, or to
subindex 1 of object 2070 (Hex) for a ROM ENTER command.
• When using a RAM ENTER command, read the ENTER command response from object 2160 (Hex) in order to verify
the ENTER command is performed successfully.
Note:
When multiple drive parameters are changed, only one ENTER command is required after the last parameter value to activate all
parameter changes.
Objects 2050/01 (Hex), 2060 (Hex), 2070 (Hex), 2150/01 (Hex) and 2160 (Hex) can be mapped to PDOs.
Summary of Contents for SI-ES3
Page 1: ......