External Interlock - YASKAWA GA700 Technical Manual

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2.17 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.

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

Figure 2.119

for an example of how two drives that run one application use the Drive Ready and Fault

output signals to interlock with the controller.

Output Signal

Figure 2.119 Interlock Circuit Example

YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual

Parameter Settings for Output Signal

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