Yaskawa Z1000U - Manual (Page 91)

3.12 External Interlock
Systems that may be affected during drive fault conditions should be interlocked with the drive fault output and ready signal.
u Operation Ready
When the “Operation ready” signal has been set to one of the multi-function contact outputs, that output closes when the drive
is ready to accept a Run command or when the drive is already running. Under the following conditions the Operation 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 renders the drive unable to run even when entering a Run command
• 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.
n 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. Figure 3.42 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.
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
SN
MB
MA
M2
M1
MC
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
SN
MB
MA
M2
M1
MC
Fault 2
Ready 2
SA
SA
Max
250 Vac
Relay 1
Relay 2
Relay 1
Relay 2
Controller
Fault
Output
Drive Ready
Drive 2
Figure 3.42 Interlock Circuit Example
3.12 External Interlock
YASKAWA ELECTRIC TOEP C710636 10B Z1000U HVAC MATRIX Drive User Manual 91
3
Electrical Installation