Mitsubishi Electric MELFA CR800 Series Instruction Manual page 77

(b) When the motors fail to decelerate within monitoring time with SS2 enabled
Time is measured after the SS2 command is enabled. If the motors fail to stop by the time the SS2
deceleration monitoring time elapses, error H2281 occurs and STO shuts off the driving power.
operation sequence is shown below:
Speed
速度
Safe stop speed
安全停止速度
Enabled
有効
SS2 command
SS2指令
Disabled
無効
Enabled
有効
SS2 monitoring
SS2監視
Disabled
無効
Enabled
有効
STO monitoring
STO監視
無効
Disabled
SS2 error Enabled
SS2エラー 有効
（H2281） Disabled 無効
Fig. 4-42: When the motors fail to decelerate within monitoring time with SS2 enabled
(c) When the SS2 command is disabled before the motors stop with SS2 enabled
Once the SS2 command is enabled, the SS2 monitoring cannot be canceled until the SOS monitoring state
becomes active (the deceleration and stop operation cannot be canceled). After the SOS state becomes
active, the SS2 monitoring is canceled.
Speed command
速度指令
Enabled
有効
SS2 command
SS2指令
Disabled
無効
Enabled
有効
SS2 monitoring
SS2監視
Disabled
無効
Enabled
有効
SOS monitoring
SOS監視
Disabled
無効
Fig. 4-43: When the SS2 command is disabled before the motors stop with SS2 enabled
Speed
速度
Command 指令
Deceleration delay
減速遅延時間
Speed
速度
Command
指令
Safe stop speed
安全停止速度
SS2 STO
Feedback
ﾌｨｰﾄﾞﾊﾞｯｸ
SS2 SOS
Feedback
ﾌｨｰﾄﾞﾊﾞｯｸ
Deceleration delay
減速遅延時間
4 SAFETY MONITORING FUNCTIONS
Time
時間
Time
時間
Safety Monitoring Functions 4-67
The