Altivar Process: How to set the ramps switching in SoMove ?
Step 1 Set the first ramp
The Altivar process range of drive can use two acceleration and deceleration ramps. Here are the parameters.
The ACC parameter makes it possible to change the drive acceleration in a given time.
The DEC parameter makes it possible to change the drive deceleration in a given time.
Two ramps can be set. Ramp 1, parameters: ACC - DEC Ramp 2, parameters: AC2 - DE2
The SoMove software and the Graphic display terminal are used to adjust these.
To achieve 3 seconds acceleration and 4 seconds deceleration, 5 actions are required in the SoMove software
1) RPT parameter: this is the type of ramp, in our case we will use a linear ramp.
2) INR parameter : Ramp increment : to select the value of the unit (1 = in seconds, 0.1=tenths of a second, 0.01=hundredths of a second)
3) ACC setting: it's set to 3 seconds. This allows the motor speed to increase from 0 to 50Hz in 3 seconds.
4) DEC parameter: it's set to 4 seconds. This reduces the motor speed from 50Hz to 0Hz in 4 seconds.
5) LRF parameter : Reference Frequency It is the reference of the frequency, here set at 50Hz.
If the reference frequency is increased from 0 to 50Hz in SoMove,
You can see on the Graphic display terminal that the drive increases from 0 to 50Hz in 3 seconds.
And also, the drive decreases from 50 to 0Hz in 4 seconds.
Step 2 Set the second ramp
The second ramp settings are available below the SoMove page, in Ramp Switching
For example: to achieve 10 seconds acceleration and 40 seconds deceleration, 5 actions are required on the SoMove software.
1) RPS parameter: Ramp switching assignment: It's necessary to assign a digital input to switch to the second ramp.
In this case, the input Di5 is assigned for the selection of the second ramp.
A switch on the right allows you to change ramp: on the left, ramp 1, on the right, ramp 2.
The switch is connected in +24Volts DC and a digital input is available on the drive.
2) AC2 parameter: it's set to 10 seconds. This allows the motor speed to increase from 0 to 50Hz in 10 seconds.
3) Parameter DE2: it's set to 40 seconds. This reduces the motor speed from 50 to 0Hz in 40 seconds.
4) FRT parameter: Ramp 2 frequency threshold This is the progression threshold on ramp 2. Here on 50Hz.
5) LRF parameter : Reference Frequency It's the reference of the frequency, here set at 50Hz.
You can see on the Graphic display terminal that the drive increases from 0 to 50Hz in 10 seconds.
And also, the drive decreases from 50 to 0Hz in 40 seconds.
It is possible to use two different acceleration or deceleration settings. Currently the drive is at 50Hz.
It will decrease from 50Hz to 0Hz in 40 seconds with Ramp 2.
But if you change the ramp during deceleration, the drive will change its travel and decrease faster.
How to set the ramp parameters using the Graphic display terminal?
Ramp 1 and ramp 2 parameters can also be changed from the Graphic display terminal.
Go to menu 5 'Complete settings'
'5.9 Generic functions'
For ramp 1, 'Ramp' menu.
For ramp 2, 'Ramp Switching' menu.
Need help with SoMove? Press F1 on any given item to open the contextual help or the product Programming Manual.
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