Safety Stop Function - Mitsubishi Electric FR-F820-00046 Instruction Manual

Fr-f800 series
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• The alarms, which have occurred when the main circuit power supply is ON, continue to be output after the power supply
is changed to the 24 V external power supply. Perform the inverter reset or turn OFF then ON the power to reset the faults.
• If the power supply changes from the main circuit power supply to the 24 V external power supply while measuring the
main circuit capacitor's life, the measurement completes after the power supply changes back to the main circuit power
supply (Pr.259 = "3").
• The output data is retained when "1 or 11" is set in Pr.495 Remote output selection.
NOTE
• Inrush current equal to or higher than the 24 V external power supply specification may flow at power-ON. Confirm that the
power supply and other devices are not affected by the inrush current and the voltage drop caused by it. Depending on the
power supply, the inrush current protection may be activated to disable the power supply. Select the power supply and capacity
carefully.
• When the wiring length between the external power supply and the inverter is long, the voltage often drops. Select the
appropriate wiring size and length to keep the voltage in the rated input voltage range.
• In a serial connection of several inverters, the current increases when it flows through the inverter wiring near the power supply.
The increase of the current causes voltage to drop further. When connecting different inverters to different power supplies, use
the inverters after confirming that the input voltage of each inverter is within the rated input voltage range. Depending on the
power supply, the inrush current protection may be activated to disable the power supply. Select the power supply and capacity
carefully.
• "E.SAF" or "E.P24" may appear when the start-up time of the 24 V power supply is too long (less than 1.5 V/s) in the 24 V
external power supply operation.
• "E.P24" may appear when the 24 V external power supply input voltage is low. Check the external power supply input.
• Do not touch the control circuit terminal block (circuit board) during the 24 V power supply operation (when conducted).
Otherwise you may get an electric shock or burn.
2.6.7

Safety stop function

 Function description
The terminals related to the safety stop function are as follows.
Terminal
symbol
*1
Input terminal as the safety stop channel 1.
S1
*1
Input terminal as the safety stop channel 2.
S2
*1
Common terminal for S1 and S2.
SIC
Output terminal used for fault detection and fault indication
display.
So (SO)
The terminal is ON (conducted) while no internal safety circuit
*2
failure
exists.
SOC
Open collector output (terminal So (SO)) common
*1
In the initial status, terminals S1 and PC, S2 and PC, and SIC and SD are respectively shorted with shorting wires. To enable the safety stop
function, remove all the shorting wires, and then connect a safety relay module as shown in the connection diagram.
*2
When any fault listed on the next page occurs in the internal safety circuit, the corresponding indication is shown on the operation panel.
NOTE
• Terminal So (SO) can be used to display a fault indication and to prevent restarting of the inverter. The signal output from
terminal So (SO) cannot be used to input a safety stop signal to other devices.
70
2. INSTALLATION AND WIRING
2.6 Control circuit
Terminal function description
Status of both the circuit between terminals S1 and SIC and
the circuit between terminals S2 and SIC
Open: Safety stop is activated.
Shorted: Safety stop is not activated
OFF: Internal safety circuit failure
ON: No internal safety circuit failure
*2
*2

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