Problem:-

We have created a 512k service for the users, In late-night, our bandwidth is usually not much used because only a limited number of users use the internet in late timings. Therefore we want to increase users bandwidth from 512k to 1MB automatically at night 12:00 am till 12:00 pm

we will divide this article into three sections.

1) Mikrotik Section (For Adding API):
2) Radius Manager Section (For Adding API):
3) Adding Service & Plan in Radius Manager:

Mikrotik Section (For Adding API):

We have to first configure API both in Mikrotik & DMASOFTLAB RM Panel.

Goto IP > Services  & enable API service.
As showed in the image below . . .

Now create API user so it can be used by RM to connect to MT.

Goto SYSTEM  > USERS and add new user by click on + icon.
User name = api
Password = api (or anything else)
As showed in the image below . . .

Radius Manager Section (For Adding API):

Open Radius Manager Admin Panel,
Goto NAS  > LIST NAS
Select your Mikrotik NAS
Click on ENABLE MIKROTIK API
Define API user name & Password that we added in mikrotik section.
As showed in the image below . . .

Adding Service & Plan in Radius Manager:

First Create a normal service profile (512k) using Radius Manager Admin Panel.
As showed in the image below . . .

Now Click on EDIT button on Special Bandwidth Periods section at the bottom of the page . . .
As showed in the image below . . .

.

Now click on NEW PERIOD
As showed in the image below . . .

Enter your desired timings (in this example I used night 12 till day 12) in which you want to allow excess/reduced bandwidth. After done, click on ADD PERIOD
As showed in the image below . . .

After You see the new Special Bandwidth Periods close this popup window.
As showed in the image below . . .

.

Click on the UPDATE SERVICE  on main service window.

Now create any user and test it by modifying timings (for test or quick results)

As showed in the image below . . .

.

Important Note: [updated as of Year 2016]

DMA 4.1.x change on the fly may not work with ver 6.30 or above. so try this with 6.29 first.

Thanks to Syed Jahanzaib -> https://aacable.wordpress.com/