External Interlock; External Interlock; Drive Ready - YASKAWA AC Drive-A1000 Technical Manual

3.12 External Interlock

Systems that may be affected if the drive faults out should be interlocked with the drive's fault output and ready signal.
u

Drive Ready

When the "Drive ready" signal has been set to one of the multi-function contact outputs, that output will close whenever the
drive is ready to accept a Run command or is already running. Under the following conditions the Drive ready signal will
switch off and remain off, even if a Run command is entered:
• when the power supply is shut off.
• during a fault.
• when there is problem with the control power supply.
• when a parameter setting error makes the drive unable to run even if a Run command has been entered.
• when a fault such as overvoltage or undervoltage is triggered as soon as the Run command is entered.
• when the drive is in the Programming mode and will not accept a Run command even when entered.
n Interlock Circuit Example
Two drives running a single application might interlock with the controller using the Drive ready and Fault output signals as
shown below. The figure illustrates how the application would not be able to run if either drive experiences a fault or is unable
to supply a Drive ready signal.
Terminal
MA, MB, MC
M1-M2
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
Output Signal
Drive Ready
Ready1 Ready2 Fault1
Drive Ready
Drive 1
MA
Fault
Run
MB
S1
Output
SC MC
M1
Drive Ready
M2
Drive 2
MA
Fault
Run
MB
S1
Output
SC MC
M1
Drive Ready
M2
Figure 3.24 Interlock Circuit Example
Fault
Fault2
Drive Ready
Operation
Circuit
Stop
Run
Controller
Relay 1
Relay 1 SA
Max
250 Vac
Relay 2
Relay 2 SA
Controller
Relay 1
Relay 1 SA
Max
250 Vac
Relay 2
Relay 2 SA

3.12 External Interlock

Parameter Setting
–
H2-01 = 06
Fault 1
Ready 1
Fault 2
Ready 2
3
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