C.5 Drive Operations by MEMOBUS/Modbus
YASKAWA ELECTRIC
SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual
453
MEMOBU
S/Modbu
s
Commu
nicat
ions
C
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-
).
• 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 (S1 to S8) 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 in
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 111
Refer to b1-02: Run Command Source 1 on page 112
for details on external reference parameter selections.
Refer to Setting 2: External reference 1/2 selection on page 183
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
