External Interlock - YASKAWA U1000 Series Technical Manual

3.15 External Interlock

Systems that may be affected during drive fault conditions should be interlocked with the drive fault output and ready
signal.
NOTICE: Systems should be interlocked to shut off power to the drive if the drive experiences a fault for models CIMR-U40477 to
40930.
◆ Operation Ready
When the "Operation Ready" signal has been set to one of the multi-function contact outputs, the output will close when
the drive is ready to accept a Run command or is already running. Under the following conditions, the Operation Ready
signal will switch off and remain 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 even when entered
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. The figure 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
MA, MB, MC
M1-M2
Figure 3.82
YASKAWA ELECTRIC SIEP C710636 02B YASKAWA U1000 Technical Manual
Output Signal
Operation Ready
Ready1 Ready2 Fault1
Operation ready
Drive 1
MA
Run Fault
MB
S1
Output
SC MC
M1
Operation Ready
M2
Drive 2
MA
Run Fault
MB
S1
Output
MC
SC
M1
Operation Ready
M2
Figure 3.81 Interlock Circuit Example
Fault
Fault2
Operation 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
3.15 External Interlock
Parameter Setting
–
H2-01 = 06
Fault 1
Ready 1
Fault 2
Ready 2
3
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