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Ramp-down time is not going below 10s

9/28/2011 6:12 AM	Rate (0)
khan, hamza Posts: 10 Rating: (1)	Hi, I have MM440, and I want to set the ramp down timebelow 10s by P1121,but it is not going below 10s. Please help me in knowing the reason behind it.
khan, hamza Posts: 10 Rating: (1)
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9/28/2011 9:33 AM	Rate (0)
Ayman Elotaify Platinum Expert Joined: 5/28/2008 Last visit: 9/3/2025 Posts: 4522 Rating: (843)	hamza08 Hi, I have MM440, and I want to set the ramp down timebelow 10s by P1121,but it is not going below 10s. Please help me in knowing the reason behind it. Hello Hamza, Ramp Down Time set in P1121 is theTime taken for motor to decelerate from maximum motor frequency (P1082) down to standstill when norounding is used. If P1082 = 50 Hz. And if no rounding is used, and if you set P1121 = 10 sec. then Motor will take 10 sec. to decelerate its speed from 50 Hz to 0 Hz But if the motor is runing on 25 Hz, so it will take only 5 seconds. The following parameters are the rounding parameters, please check them: P1130[3] Ramp-up initial rounding time P1131[3] Ramp-up final rounding time P1132[3] Ramp-down initial rounding time P1133[3] Ramp-down final rounding time P1134[3] Rounding type Hope this helps.
	Ayman Elotaify
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9/28/2011 2:39 PM	Rate (0)
Barlera Experienced Member Joined: 2/21/2011 Last visit: 4/18/2024 Posts: 52 Rating: (12)	Hello hamza08 Ithink this Fuction Diagram in attached can help you too. Best Regards, Henrique Barlera Attachment Ramp_Fuction_Generator_MM.pdf (287 Downloads)

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