3.14 External Interlock
92 YASKAWA ELECTRIC SIEP C710616 35D YASKAWA AC Drive E1000 Technical Manual
3.14 External Interlock
Systems that may be affected if the drive faults out should be interlocked with the drive’s fault output and ready signal.
◆ 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.
■
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.
Figure 3.42
Figure 3.36 Interlock Circuit Example
Terminal Output Signal Parameter Setting
MA, MB, MC Fault –
M1-M2 Drive Ready H2-01 = 06
Operation
Circuit
Drive Ready
Drive Ready
Stop
Ready1 Ready2 Fault1
Run
Fault2
Run
S1
SC
M2
M1
Fault 1
Ready 1
SA
SA
Max
250 Vac
Relay 1
Relay 2
Relay 1
Relay 2
Controller
Fault
Output
Drive Ready
Drive 1
Run
S1
SC
M2
M1
Fault 2
Ready 2
SA
SA
Max
250 Vac
Relay 1
Relay 2
Relay 1
Relay 2
Controller
Fault
Output
Drive Ready
Drive 2
MA
MB
MC
MA
MB
MC
SIEP_C710616_35.book 92 ページ ２０１５年１１月３０日 月曜日 午後２時２分
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