Test And Checking Failure - Mitsubishi Electric FR-A800 Safety Stop Function Instruction Manual

4

TEST AND CHECKING FAILURE

CAUTION
 To avoid systematic faults, a test even for faulty demands of the safety function has to be performed
in order to check the correct function of the monitor signal. This test shall be carried out at system
installation, any software changes, parameterization changes, and/or at least once per year.
I/O status and failure
FR-A800/F800 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
 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.
Error definition
Option fault.
Communication option fault
Parameter storage device fault
Retry count excess
Parameter storage device fault
Operation panel power supply short circuit/
RS-485 terminals power supply short
circuit
 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.
NOTE
• The response time from safety stop signal input to drive shutoff (safe state) is faster than 8ms.
• Hold the ON or OFF status for 2ms or longer to input signal to terminal S1 or S2.
Signal input shorter than 2ms is not recognized.
10
TEST AND CHECKING FAILURE
Table.5 Truth table of safety related signals
Input terminal ,
 
S1 S2
 
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
E.PE
E.RET
E.PE2
E.CTE
Output
terminal
Inverter running status
SO
Output shutoff (Safe state)
Drive enabled

Output shutoff (Safe state)

Output shutoff (Safe state)

Output shutoff (Safe state)

Output shutoff (Safe state)
Output shutoff (Safe state)
Output shutoff (Safe state)
Output shutoff (Safe state)
Error definition
24 VDC power fault
Safety circuit fault
Overspeed occurrence
CPU fault
Internal circuit fault
Operation panel
indication
E.SAF SA
 
Not Not
displayed displayed
Not Not
displayed displayed
Displayed Displayed
Displayed Displayed
Not
Displayed
displayed
Not
Displayed
displayed
Displayed Displayed
Displayed Displayed
Displayed Displayed
Operation panel indication
E.P24
E.SAF
E.OS
E.CPU
E.5 to E.7
E.13
