Operation; Truth Table - WEG CFW-11 Guía De Instalación, Configuración Y Operación

Figure 3: Example of connection of shielding of control cable (in this case it was presented an example of
cables connected on XC1 terminals, but the same applies to XC25 terminals)
If the degree of protection of the used inverter is lower than IP54, it must be installed inside
an IP54 (minimum) cabinet.

3 OPERATION

3.1 TRUTH TABLE

STO1 Logic Level STO2 Logic Level
(voltage between (voltage between
XC25:1-2
terminals)
0 (0 V)
0 (0 V)
1 (24 V)
1 (24 V)
Table 3: Safety stop function operation
Safety Stop
XC25:3-4 Function
terminals)
Activated
0 (0 V)
(enabled)
1 (24 V)
Fault
0 (0 V)
1 (24 V) Disabled
Inverter Behavior
Inverter remains in STO state and does not
accept commands. In CFW70x inverters with
software version V1.02 or higher, it is indicated
A170 (activation of safety stop function advice)
on the keypad. In order to escape this condition,
it is required to have STO1 = 1 and STO2 = 1
simultaneously
Inverter is tripped by F160 fault (safety stop
function related fault). To escape this condition,
it is required to reset the inverter
Inverter accepts commands normally
CFW-11, CFW-11M, CFW70X | 11
Safety Stop Function