Chapter 7 Protective Functions - Mitsubishi Electric 800 Series Instruction Manual

7
Protective Functions
 Inverter fault and alarm indications
• When a fault of safety related parts occurs, the inverter output is shut off by the protective function. The Fault (ALM) signal
is output, and "E.SAF" (safety circuit fault) is displayed on the operation panel.
• When any fault occurs, take an appropriate corrective action, then reset the inverter, and resume the operation. Restarting
the operation without a reset may break or damage the inverter.
• When a protective function is activated, note the following points.
Item
Fault signal Opening the magnetic contactor (MC) provided on the input side of the inverter at a fault occurrence shuts off the
control power to the inverter, therefore, the fault output will not be retained.
Fault or alarm When the protective function is activated, the operation panel displays a fault indication.
indication
Operation restart While the protective function is activated, the inverter output is kept shutoff. Power reset or inverter reset is required
method to restart the operation.
 Operation of the SA warning and the SAFE and SAFE2 signals
E.SAF Status of
*3
indication safety
related parts
Not Normal
displayed.
Displayed. Fault
*1 If any of the faults shown in the following table occurs, the SAFE signal and the SAFE2 signal are turned OFF.
Fault type
Option fault
Communication option fault
Parameter storage device fault (control circuit
board)
Retry count excess
Parameter storage device fault (main circuit board) E.PE2
Safety circuit fault
Overspeed occurrence
Speed deviation excess detection
Signal loss detection
Brake sequence fault
CPU fault
Internal circuit fault
*2 When safety communication functions are enabled (Pr.S002 ≠ "0"), the STO function is enabled while the safety communication is not
established.
*3 If another fault occurs when the fault E.SAF occurs, the other fault indication may be displayed.
*4 If another warning occurs when the warning SA occurs, the other warning indication may be displayed.
*5 The table shows the signal status in positive logic. In negative logic, the signal status is opposite.
*6 To assign the functions of the SAFE signal and SAFE2 signal to output terminals, set either value shown in the following table in Pr.192 ABC
terminal function selection.
To output the signal via communication, the function can be assigned also to Pr.190 to Pr.196 (Output terminal function selection) using
communication protocols. For details, refer to the Instruction Manual (Communication) or the Instruction Manual of the communication option.
Output signal Pr.190 to Pr.196 settings
Positive logic
SAFE 80
SAFE2 81
*7 The use of the SAFE signal and SAFE2 signal has not been certified for compliance with safety standards.
STO function status when
the STO or SS1 command is
input
STO disabled
*2
STO enabled
-
Operation panel indication
E.OPT
E.OP1
E.PE
E.RET
E.SAF
E.OS
E.OSD
E.ECT
E.MB1 to E.MB7
E.CPU
E.5 to E.7
E.13
Negative logic
180
181
Description
Inverter operating
status indication
Operation enabled Not
displayed.
Output shutoff (Safe Displayed.
state)
Output shutoff (Safe Not
state) displayed.
*5*6*7
SA Output signal
*4
SAFE SAFE2
OFF
*1
ON
*1 *1
ON ON
OFF OFF
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