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C.6 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 S
o
and from MEMOBUS/Modbus communications are
both linked by an OR operation.
u
Controlling the Drive
To start and stop the drive or set the frequency reference using MEMOBUS/Modbus communications, an external reference
must be selected and the parameters listed below must be adjusted accordingly.
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 121
Refer to b1-02: Run Command Selection 1 on page
for details on external reference parameter selections.
Refer to Setting 2: External Reference 1/2 Selection on page
for instructions on how to select external reference 1 and 2.
C.6 Drive Operations by MEMOBUS/Modbus
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YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual