Mitsubishi Electric 800 Series Instruction Manual page 30

*1 The start command is not automatically changed by the safety sub-function.
NOTE
• Use a non-excitation type brake since the brake is activated when the SBC signal is turned OFF.
• The SBC function only controls power supply to the mechanical brake (relay operation), and it does not guarantee the
brake operation including the condition without abrasion.
• The SBC function is not activated when the output is shutoff by the protective function other than E.SAF or a function other
than the STO function (for example, MRS signal input).
 SBC brake operation frequency (Pr.S023)
The following shows the operation example when the STO function is activated by the SS1 command input.
• The brake operating conditions can be added by setting Pr.S023.
• The SBC signal is turned OFF when the motor speed is decreased to the value set in Pr.S023 or lower before the time set
in Pr.S004 elapses after the SS1 function is activated. This function is disabled when Pr.S023 = "0 (initial value)".
30
5. Safety Sub-Functions
5.5 SBC function
Output frequency
Start command
ON
(STF)*1
SS1 command
ON
(SS1C)
STO output
ON
(STOS)
SBC output
ON
(SBC)
Normal operation
Output frequency
Pr.S023
Start command
(STF)
SS1 command
(SS1C)
STO output
(STOS)
SBC output
(SBC)
Normal operation
Brake operating
Pr.S004
STO state
Brake operating
Pr.S004
ON
ON
ON
ON
STO state
Time
ON
ON
ON
ON
Normal operation
Time