IPE300 series engineering VFD Communication protocol
-286-
Read input of HDIA
high-speed pulse
0.00–50.00kHz (Unit: 0.01Hz)
Read input of HDIB
high-speed pulse
Read the actual step
of multi-step speed
-300.0–300.0% (Unit: 0.1%)
The Read/Write (R/W) characteristics indicate whether a function parameter can be read and written.
For example, "Communication-based control command" can be written, and therefore the command
code 06H is used to control the VFD. The R characteristic indicates that a function parameter can
only be read, and W indicates that a function parameter can only be written.
Note: Some parameters in the preceding table are valid only after they are enabled. Take the running
and stop operations as examples, you need to set "Running command channel" (P00.01) to
"Communication", and set "Communication mode of running commands" (P00.02) to Modbus. For
another example, when modifying "PID reference", you need to set "PID reference source" (P09.00)
to Modbus communication.
The following table describes the encoding rules of device codes (corresponding to the identification
code 2103H of the VFD).
9.4.6 Fieldbus scale
In practical applications, communication data is represented in the hexadecimal form, but
hexadecimal values cannot represent decimals. For example, 50.12 Hz cannot be represented in the
hexadecimal form. In such cases, multiply 50.12 by 100 to obtain an integer 5012, and then 50.12 can
be represented as 1394H in the hexadecimal form (5012 in the decimal form).
In the process of multiplying a non-integer by a multiple to obtain an integer, the multiple is referred to
as a fieldbus scale.
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