Electrical Installation
3
3.8 External Interlock
YASKAWA SIEPC71061737B GA800 Drive Technical Reference 107
3.8 External Interlock
For applications that will have unwanted effects on the system if the drive stops, make an interlock between fault
relay output (MA, MB, MC) and the MFDO DriveReady signal.
◆ Drive Ready
When the drive is operating or is prepared to accept a Run command, the MFDO terminal to which Drive Ready [H2-
xx = 6] is set will enter the ON status.
In these conditions, Drive Ready is OFF and the drive ignores Run commands:
• The drive is de-energized
• During a fault
• There is problem with the control power supply
• There is a parameter setting error that will not let the drive run, although a Run command is entered
• An overvoltage or undervoltage fault occurs when the Run command is entered
• The drive is in Programming Mode.
◆ Interlock Circuit Example
Refer to Figure 3.55 for an example of how two drives that run one application use the Drive Ready and Fault output
signals to interlock with the controller.
Terminal Output Signal Parameter Settings for Output Signal
MA, MB, MC Fault -
M1-M2 Drive Ready H2-01 = 6
Figure 3.55 Interlock Circuit Example
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