Test And Checking Failure - Mitsubishi Electric 800 Series Instruction Manual

4

TEST AND CHECKING FAILURE

Caution
 To avoid system faults, check the safety stop function at least once per year.
To comply with SIL 3, the safety stop function must be checked at least once in three months.
Also, check the safety stop function at system installation, any software changes, and parameter
setting changes.
I/O status and inverter operation
The FR-A800/F800 inverter's safety related I/O status obeys the following truth table.
Internal
Input safety
power circuit
status

OFF
Normal
Normal
Normal
Normal
ON
Fault
Fault
Fault
Fault
 The terminal ON state shows that the terminal is conducted (the line is closed), and the OFF state shows that the terminal is
not conducted (the line is open).
 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 faults shown in the following table occurs, terminal So (SO) and the SAFE signal turn OFF.
Error definition
Option fault.
Communication option fault
Internal storage device fault
Parameter storage device fault
(control circuit board)
Retry count excess
Parameter storage device fault
(main circuit board)
Operation panel power supply short circuit/
RS-485 terminals power supply short circuit
24 VDC power fault
Safety circuit fault
 When the internal safety circuit is operated normally (no faults occurs), terminal So (SO) and the SAFE signal remains ON
until "E.SAF" is displayed. Terminal So (SO) and the SAFE signal turns OFF when "E.SAF" is displayed.
 "SA" is displayed when terminals S1 and S2 are identified as OFF due to a fault occurred in the internal safety circuit.
 If another fault occurs when the fault E.SAF occurs, the other fault indication may be displayed.
 If another warning occurs when the warning SA occurs, the other warning indication may 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.
12
TEST AND CHECKING FAILURE
Table 7 Truth table of safety related signals
Input terminal ,
 
terminal
S1 S2 So (SO)
 
OFF
ON ON ON
ON OFF OFF
OFF ON OFF
OFF OFF ON
ON ON OFF
ON OFF OFF
OFF ON OFF
OFF OFF OFF
Operation panel indication
E.OPT
E.OP1 to E.OP3
E.PE6
E.PE
E.RET
E.PE2
E.CTE
E.P24
E.SAF
Output
Output
signal
, ,
  
SAFE
Output shutoff
OFF
(Safe state)
OFF Drive enabled

Output shutoff
OFF
 
(Safe state)
Output shutoff
OFF
 
(Safe state)
Output shutoff
ON
 
(Safe state)
Output shutoff
OFF
(Safe state)
Output shutoff
OFF
(Safe state)
Output shutoff
OFF
(Safe state)
Output shutoff
OFF
(Safe state)
Error definition
Overspeed occurrence
Speed deviation excess detection
Signal loss detection
Excessive position fault
Encoder signal loss for orientation
Brake sequence fault
CPU fault
Encoder phase fault
Magnetic pole position unknown
Internal circuit fault
Operation panel
Inverter
indication
running
status
E.SAF

Not
displayed
Not
displayed
Displayed
Displayed
Not
displayed
Displayed
Displayed
Displayed
Displayed
Operation panel indication
E.OS
E.OSD
E.ECT
E.OD
E.ECA
E.MB1 to E.MB7
E.CPU
E.5 to E.7
E.EP
E.MP
E.13
SA

Not
displayed
Not
displayed
Displayed
Displayed
Displayed
Not
displayed

Displayed
Displayed
Displayed