Chapter 5 Safety Sub-Functions; Sto Function - Mitsubishi Electric 800 Series Instruction Manual

5
Safety Sub-Functions
5.1

STO function

The inverter output is shut off when the command signal is input from an external device or when the protective function
(E.SAF) is activated.
 Basic operation
• The STO function is activated when the STO command (STOC) signal is turned OFF during operation or at a stop.
• While the STO function is active, the inverter is in the STO state and the output is shut off.
• The STO state is cleared by turning ON the STOC signal.
NOTE
• When the protective function (E.SAF) is activated, the inverter output is shut off by the STO function regardless of the
STOC signal status.
22
5. Safety Sub-Functions
5.1 STO function
Output frequency
STO command
ON
(STOC)
STO output
ON
(STOS)
Normal operation
Actual motor speed
Normal operation
STO state
Time
ON
ON