WEG CFW-11 User Manual - page 58
Installation and Connection
3
CFW-11 | 3-37
It’s possible to set one or more digital and relay outputs of the inverter to indicate that Safety Stop function is
activated (state of the inverter = STO), if the inverter is or not on a fault state and more specifically if the inverter
was tripped by F160 fault (Safety Stop function fault). For that use the parameters P0275 (DO1), P0276 (DO2),
P0277 (DO3), P0278 (DO4) and P0279 (DO5) according to
.
Table 3.13 - P0275...P0279 options for indication of state of inverter or faults on DOx digital outputs
DOx Digital Output Function
Value to be Set on
P0275...P0279
Comment
State of the inverter = STO
(Safety Stop function activated)
33
Safety Stop function disabled:
relay/transistor OFF
Safety Stop function activated:
relay/transistor ON
F160 fault
(inverter tripped by Safety Stop function fault actuation)
34
Without F160 fault: relay/transistor OFF
With fault F160: relay/transistor ON
Fault
(inverter tripped by actuation of any fault)
13
Without fault: relay/transistor OFF
With fault: relay/transistor ON
Without fault
(state of the inverter is not fault)
26
With fault: relay/transistor OFF
Without fault: relay/transistor ON
Refer to inverter programming manual for a complete list of options for parameters P0275...P0279.
3.3.2.4 Periodic Test
Safety Stop function, alternatively safety stop inputs (STO1 and STO2), must be activated at least once a year
for preventive maintenance purposes. Inverter power supply must be switched off and then on again before
carrying out this preventive maintenance. If during testing the power supply to the motor is not switched off,
safety integrity is no longer assured for the Safety Stop function. The drive must therefore be replaced to ensure
the operational safety of the machine or of the system process.