Mitsubishi FR-A800

Control circuit
58
INSTALLATION AND WIRING
Connection diagram
To prevent automatic restart after a fault occurrence, connect the reset button of a safety relay module or a safety
programmable controller across the terminals SO and SOC. The reset button acts as the feedback input for the safety relay
module or the safety programmable controller.
Safety stop function operation
 ON: The transistor is conducted. OFF: The transistor is not conducted.
 When not using the safety stop function, short across terminals S1 and PC, S2 and PC, and SIC and SD to use the inverter. (In the initial status,
terminals S1 and PC, S2 and PC, and SIC and SD are respectively shorted with shorting wires.)
 If any of the protective functions shown in the following table is activated, the terminal SO turns OFF.
 If the internal safety circuit is operated normally, the terminal SO remains ON until E.SAF is displayed, and the terminal SO turns 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.
For more details, refer to the Safety stop function instruction manual (BCN-A23228-001). (Find a PDF copy of this manual in
the CD-ROM enclosed with the product.
Input
power
Internal safety
circuit status
Input terminal ,
Output
terminal
Inverter running status
Operation panel
indication
S1 S2 SO
E.SAF  SA 
OFF OFF Output shutoff (Safe state) Not displayed Not displayed
ON
Normal ON ON ON
 Drive enabled Not displayed Not displayed
Normal ON OFF OFF
 Output shutoff (Safe state) Displayed Displayed
Normal OFF ON OFF
 Output shutoff (Safe state) Displayed Displayed
Normal OFF OFF ON
 Output shutoff (Safe state) Not displayed Displayed
Fault ON ON OFF Output shutoff (Safe state) Displayed
Not displayed

Fault ON OFF OFF Output shutoff (Safe state) Displayed Displayed
Fault OFF ON OFF Output shutoff (Safe state) Displayed Displayed
Fault OFF OFF OFF Output shutoff (Safe state) Displayed Displayed
R/L1 S/L2 T/L3
U
V
W
M
SO
SOC
S1
S2
G G
ASIC
Inverter
SIC
SD
Logic
RESET
Emergency
stop button
Safety relay module
/ Safety programmable controller
PC
Gate
Driver
Gate
Driver
IGBTs
Fuse
24VDC
CPU
+24V
Fault record
Operation panel
indication
Option fault E.OPT
Communication option fault E.OP1
Parameter storage device fault E.PE
Retry count excess E.RET
Parameter storage device fault E.PE2
Operation panel power supply short circuit/
RS-485 terminals power supply short circuit
E.CTE
24 VDC power fault E.P24
Safety circuit fault E.SAF
Overspeed occurrence E.OS
Speed deviation excess detection E.OSD
Signal loss detection E.ECT
Excessive position fault E.OD
Brake sequence fault E.MB1 to E.MB7
Encoder phase fault E.EP
CPU fault
E.CPU
E.5 to E.7
Internal circuit fault E.13
Fault record
Operation panel
indication