Writing to More than One Holding Register/Reading the Indicated Register

The drive uses function code 5A (Hex.) to write to more than one register, then it reads the contents of four holding registers at the same time.

The function for writing to more than one register is the same as the function for function code 10 (Hex.). You can write to a maximum of 16 holding registers.

The four holding registers to be read from are specified in H5-25 to H5-28 [Function 5A Register x Selection].

Table 1 shows example messages when you write to more than one holding register or when you read more than one command register. Table 1 uses this register data for the examples:

• The drive for slave 1 is set for Forward run with a frequency reference of 60.00 Hz.

• The setting in H5-25 to H5-28 and the data in the specified holding registers are as follows.

  • H5-25 = 0044H: U1-05 [Motor Speed] = 60.00 Hz (6000 = 1770H)

  • H5-26 = 0045H: U1-06 [Output Voltage Ref] = 200.0 V (2000 = 07D0H)

  • H5-27 = 0042H: U1-03 [Output Current] = 50% of drive rated current (100% = 8192, 50% = 4096 = 1000H)

  • H5-28 = 0049H: U1-10 [Input Terminal Status] = 00H

When you rewrite the parameter value with the write command through the H5-11 [Comm ENTER Command Mode] setting, you must use the Enter command to save and enable the contents of the changes. Refer to H5-11: Comm ENTER Command Mode and Enter Command for more information.