C.5 Drive Operations by MEMOBUS/Modbus
The drive operations that can be performed by MEMOBUS/Modbus communication depend on drive parameter settings. This
section explains the functions that can be used and related parameter settings.
u
Observing the Drive Operation
A PLC can perform the following actions with MEMOBUS/Modbus communications at any time regardless of parameter
settings (except H5-oo).
• Observe drive status and drive control terminal status from a PLC.
• Read and write parameters.
• Set and reset faults.
•
Set multi-function inputs. Inputs settings from the input terminals So and from MEMOBUS/Modbus communications are
both linked by an OR operation.
u
Controlling the Drive
Select an external reference and adjust the parameters in Table C.1 accordingly to start and stop the drive or set the frequency
reference using MEMOBUS/Modbus communications.
Table C.1 Setting Parameters for Drive Control from MEMOBUS/Modbus
Reference Source Parameter Name Required Setting
External Reference 1
b1-01 Frequency Reference Selection 1 2
b1-02 Run Command Selection 1 2
External Reference 2
b1-15 Frequency Reference Selection 2 2
b1-16 Run Command Selection 2 2
Refer to b1-01: Frequency Reference Selection 1 on page 126 and Refer to b1-02: Run Command Selection 1 on page
127 for details on external reference parameter selections. Refer to Setting 2: External Reference 1/2 Selection on page
209 for instructions on selecting external references 1 and 2.
C.5 Drive Operations by MEMOBUS/Modbus
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
471
C
MEMOBUS/Modbus
Communications
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