External Interlock; External Interlock; Drive Ready - YASKAWA FSDrive-MV1000 Instructions Manual

3.8 External Interlock

3.8

External Interlock

With applications that may be affected if the drive faults out, always interlock the "Fault" and "Drive ready" sequence
output signals.

◆ Drive Ready

When the Drive ready signal has been set to the sequence output, that output will close whenever the drive is ready to
accept a Run command or is already running. During faults, the output is open. It will also switch off and remain off
when the drive is unable to run even if a Run command is entered although no fault signal is output. The Drive ready
signal goes off under the following conditions.
• 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
■
In some cases external signals other than the configuration signals of the drive are required as a condition for the drive to
run.
In such cases, in addition to the ready conditions stated above, input these external interlock signals to the drive to use
them as external interlock signals.
If any condition for these external interlock signals is not satisfied, the drive stops.
An example circuit configuration is shown below.
Figure 3.12
Run command
Primary panel on
External interlock established External Interlock established
Secondary panel on
Motor temperature normal
Example of interlock
signal input
<2>
<1> "External interlock" signifies conditions where machinery or equipment could be damaged if the drive or motor is run outside
the scope of its specifications.
<2> Always allocate necessary signals for protecting the system as external interlock signals.
Examples: Machine lubrication unit normal (N.O. contact), emergency stop normal (N.O. contact), etc.
74
Drive
Drive internal
circuit
<1> <1>
Figure 3.12 Interlock Circuit Example
Schematic for the drive's internal circuit
Interlock signal input
Run command
Figure 3.13
YASKAWA ELECTRIC EZZ010928 FSDrive-MV1000 Instructions
Drive ready
Drive ready
circuit
Run
command