
6INSTALLATION AND WIRING
Table 4 Truth table of safety related signals
ON: The transistor is conducted. OFF: The transistor is not conducted.
When not using the safety stop function, short across terminals S1 and PC, and S2 and PC to use the inverter. (In the initial status, terminals S1
and PC, and S2 and PC are respectively shorted with shorting wires.)
If any of the faults shown in the following table occurs, terminal SO, the SAFE signal, and the SAFE2 signal are turned OFF.
When the internal safety circuit is operated normally (no fault occurs), terminal SO, the SAFE signal, and the SAFE2 signal remain ON until
"E.SAF" is displayed. Terminal SO, the SAFE signal, and the SAFE2 signal are turned OFF when "E.SAF" is displayed.
SA is displayed when the terminals S1 and S2 are identified as OFF due to the internal safety circuit failure.
If another fault occurs at the same time as E.SAF, the other fault can be displayed.
If another warning occurs at the same time as SA, the other warning can be displayed.
The ON/OFF state of the output signal is the one for the positive logic. The ON and OFF are reversed for the negative logic.
To assign the functions of the SAFE signal and SAFE2 signal to output terminals, set values shown in the following table in any two parameters
from Pr.190 to Pr.196 (Output terminal function selection).
The use of the SAFE signal and SAFE2 signal has not been certified for compliance with safety standards.
• The response time from safety stop signal input to drive shutoff (safe state) is faster than 4 ms.
• Hold the ON or OFF status for 2 ms or longer to input signal to terminal S1 or S2.
Signal input shorter than 2 ms is not recognized.
Input
power
Internal
safety
circuit
status
Input terminal
,
Output
terminal
Output signal
, , Inverter
running
status
Operation panel indication
S1 S2 SO SAFE SAFE2 E.SAF SA
OFF OFF OFF OFF Output shutoff
(Safe state) Not displayed Not displayed
ON
Normal ON ON ON OFF ON Drive enabled Not displayed Not displayed
Normal ON OFF OFF OFF OFF Output shutoff
(Safe state) Displayed Displayed
Normal OFF ON OFF OFF OFF Output shutoff
(Safe state) Displayed Displayed
Normal OFF OFF ON ON ON Output shutoff
(Safe state) Not displayed Displayed
FaultONONOFFOFFOFF
Output shutoff
(Safe state) Displayed Not displayed
Fault ON OFF OFF OFF OFF Output shutoff
(Safe state) Displayed Displayed
Fault OFF ON OFF OFF OFF Output shutoff
(Safe state) Displayed Displayed
Fault OFF OFF OFF OFF OFF Output shutoff
(Safe state) Displayed Displayed
Output signal Pr.190 to Pr.196 settings
Positive logic Negative logic
SAFE 80 180
SAFE2 81 181
Error definition Operation panel
indication
Option fault E.OPT
Communication option fault E.OP1
Parameter storage device fault (control
circuit board) E.PE
Retry count excess E.RET
Parameter storage device fault (main circuit
board) E.PE2
Safety circuit fault E.SAF
Overspeed occurrence E.OS
Speed deviation excess detection E.OSD
Brake sequence fault E.MB4 to E.MB7
CPU fault E.CPU
E.5 to E.7
Internal circuit fault E.13
Error definition Operation panel
indication