C.6 Drive Operations by MEMOBUS/Modbus
YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual 389
MEMOBUS/Modbus
Communications
C
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.
◆ Observing the Drive Operation
A PLC can perform the following actions with MEMOBUS/Modbus communications at any time regardless of
parameter settings (except H5-).
• 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 and from MEMOBUS/Modbus communications
are both linked by an OR operation.
◆ 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
Refer to b1-01: Frequency Reference Source 1 on page 106 and Refer to b1-02: Run Command Source 1 on page 108
for details on external reference parameter selections. Refer to Setting 2: External Reference 1/2 Selection on page 161
for instructions on how to select external reference 1 and 2.
Reference Source Parameter Name Required Setting
External Reference 1
b1-01 Frequency Reference Source 1 2
b1-02 Run Command Source 1 2
External Reference 2
b1-15 Frequency Reference Source 2 2
b1-16 Run Command Source 2 2
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