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3.14 External Interlock
Systems that may be affected during drive fault conditions should be interlocked with the drive fault output and ready signal.
u
Operation Ready
Under the following conditions, the Operation Ready signal switches off and remains off during a fault 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 renders the drive unable to run even when entering a Run command
• 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.
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Interlock Circuit Example
Two drives running a single application might interlock with the controller using the Operation ready and Fault output signals
as shown below.
illustrates how the application would not be able to run if either drive experiences a fault or is
unable to supply an Operation ready signal.
Terminal
Output Signal
Parameter Setting
MA, MB, MC
Fault
–
M1-M2
Operation Ready
H2-01 = 06
Operation
Circuit
Operation Ready
Operation ready
Stop
Ready1
Ready2
Fault1
Run
Fault2
Run
S1
SC
MB
MA
M2
M1
MC
Fault 1
Ready 1
SA
SA
Max
250 Vac
Relay 1
Relay 2
Relay 1
Relay 2
Controller
Fault
Output
Operation Ready
Operation Ready
Drive 1
Run
S1
SC
MB
MA
M2
M1
MC
Fault 2
Ready 2
SA
SA
Max
250 Vac
Relay 1
Relay 2
Relay 1
Relay 2
Controller
Fault
Output
Drive 2
Figure 3.60 Interlock Circuit Example
3.14 External Interlock
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
129
3
Electrical Installation
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