266 YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual
2.5 Drive Operations by MEMOBUS/Modbus
2.5 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.
◆ 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 2.1 Setting Parameters for Drive Control from MEMOBUS/Modbus
Refer to b1-01: Frequency Reference Selection 1 on page 35 and b1-02: Run Command
Selection 1 on page 39 for details on external reference parameter selections. Refer to
Setting 2: External Reference 1/2 Selection on page 142 for instructions on how to select
external reference 1 and 2.
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
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