B.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 for H5-ooparameters):
• observe drive status and drive control terminal status from a PLC.
• read and write parameters.
• set and reset faults.
• set multi-function inputs.
Note: Input settings from the input terminals (S1 to S8) and from MEMOBUS/Modbus communications are both linked by a logical OR operation.
u
Controlling the Drive
Select an external reference and adjust the parameters in Table B.1 accordingly to start and stop the drive or set the frequency
reference using MEMOBUS/Modbus communications.
Table B.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 18 and Refer to b1-02: Run Command Selection 1 on page 19
for details on external reference parameter selections. Refer to Setting 2: External Reference 1/2 Selection on page 97 for
instructions on selecting external references 1 and 2.
B.5 Drive Operations by MEMOBUS/Modbus
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YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
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