External Interlock - YASKAWA GA700 Technical Manual

High performance type; 200 v class: 0.4 to 110 kw; 400 v class: 0.4 to 355 kw

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2.16 External Interlock

In applications where the system will be negatively impacted if the drive goes down, always create an interlock

between fault relay output (MA, MB, MC) and the DriveReady signal of multi-function digital output.

When the drive is prepared for acceptance of the Run command, or is already operating, the multi-function digital

output terminal to which Drive Ready [H2-xx = 6] is set will enter the ON status.

In any of the following instances, Drive Ready is set to OFF, and Run commands will be ignored.

• 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.

Output Signal

Figure 2.59 Interlock Circuit Example

YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual

Parameter settings for Output signal