Welcome to G-TV!
Today I will be showing you a multispeed sequence function on an Eaton Cutler Hammer’s M-Max
AC Drive without the use of a PLC.
In a previous video, I set up the M-Max drive tin a scenario where I had to load 50 gallon
barrels using a motor to pump in the liquid at a slow rate to prevent splash out, then
fast to fill it up and then slow again to top it off.
This action was done by simulating a PLC by manually switching my inputs on and off.
For this demonstration, I will program the drive to do the PLC sequence control.
For initial set up of the drive, please check out the link below to see the settings changed
for PLC control as well as motor nameplate data.
I have already plugged in my preset values.
My minimum frequency for my digital inputs is currently 20 Hertz with a maximum frequency
of 60 Hertz.
I will first set up the PLC sequence control operating mode by going to P 10.9.
I will change this value to a 1 so that I can execute the program sequence once.
Then I will scroll to P 10.11 to create a set time for the fixed frequency that I changed
in the previous video.
I will change this value to 5 seconds.
Then I will change P10.12 the set time for my second fixed frequency to 10 seconds.
I will then go to P 10.13 and change this value to 10 seconds.
P 10.13 will be directly related to P 10.3, which is a value I did not set last time.
I will scroll to P10.3 and change that value to 20 Hertz.
The last parameter I will change is 3.21.
This is where I will assign a control signal to the PLC program start.
I will change this to a 4 so that I can use DI 4 to initiate the start command for my
controlled sequence.
I can now start my sequence.
The motor will ramp up to 20 Hertz for 5 seconds.
Then it will start to ramp up to 60 hertz, and it will remain at 60 hertz here for approximately
ten seconds.
The motor will then ramp down to 20 hertz.
It will remain here for 10 seconds before initiating a stop.
Another interesting feature is that I can select any of the settings to run the motor
in reverse.
In the M-Max manual, the fixed frequencies are assigned a number when the motor is intended
to go in reverse.
The sum of these numbers can be plugged into P10.10.
For example if FF1, the parameter in P10.2 is given the value of 2 and FF2, the parameter
in P10.3 is given a 4.
Then putting a 6 in P 10.10 will run the last two fixed frequencies in reverse.
The drive will ramp up 20 Hertz for five seconds.
Stop.
Then reverse at 60 hertz for 10 seconds and reverse once more for 10 seconds at 20 Hertz.
Eaton Cutler Hammer’s M-Max AC Drive along with thousands of other products and services
are available at galco.com