Hitachi L200 Intelligent Input Terminal wiring

[robhrzic]

Hello All!

I have a friend that recently purchased a Hitachi L200 VFD for use with a Series II Bridgeport. He does not plan on using the VFD for anything else other than to turn the mill's motor on (forward / reverse). In other words, he is not converting it to CNC, nor will he be using a PC to control or operate the spindle.

He simply wants to turn on the power to the VFD, then use the mill's forward / reverse switch (which will be wired to the VFD via the "Intelligent Input Terminals") to control the motor.

Sounds like a simple concept, but we are having a bit of trouble. First of all, let me state that I am not an electrician, an electrical engineer, nor one who knows very much about circuits and logic controls.

I believe that I have configured it correctly per the instructions, but I can not control the VFD via the Input terminals. I have attached the relevant pages from the manual for reference.

I set the SR/SK DIP switch to SK per page 4-9, which I believe is correct.

I am a little confused by the schematic on page 4-10. Can I use the forward / reverse swith from the mill, or do I need some sort of transistorized device to interface with the inputs?

I set the A002 = 01 parameter, per page 4-12, to enable the control terminal (see page 3-10 for options).

Now, if I understand correctly, all I need to do, per page 4-12, is connect the PCS terminal (via the switch) to terminal "1", and the motor should turn on, in the forward direction. If I connect the PCS terminal (via the switch) to terminal "2", the motor should turn on, in the reverse direction.
But nothing happens when i make these connections.

I know that the VFD is working, and wired correctly, because if I turn the VFD on (with the A002 = 02 option set), the motor turn on and runs. I can also adjust the speed with the potentiometer. But I have no way to reverse the motor, without changing VFD parameters.

I do not understand whay it does not work using the Intelligent Input Terminal. What am I missing? Any help or advice would be greatly appreciated.

[robhrzic]

OOPS! Here are the attachments.

[mactec54]

Hi Robhrzic

Have you got 24vDC in your switching circuit you have the option to use the internal 24vDC supply or a external supply which you would have to supply & when you get it going do not switch from forward to reverse to quickly to do forward & reverse instant you will need a braking resistor fitted

[robhrzic]

Machtec64,

Yes, I have 26.7 VDC across the PCS and L (ground) terminal.

[TOTALLYRC]

I would try using a jumper wire or a couple of temporary switches to see if the bridgeport switch is working correctly.

I have the sj200 using mach3 but the principle is the same.

Mike

[JimP]

That switch should be on SR i think.

[TOTALLYRC]

I just took a look at the manual for the L200 manual and here are what the basic settings should be.

C001=00 gives forward from terminal 1
C002=01 gives reverse from terminal 2
A001=00 uses the onboard pot for frequency control
A002=01 allows use of the terminals instead of keypad for forward and reverse.

Once you get it up and running and if you are only using it for on and off, you should set some acceleration profiles to keep it from tripping out when starting/stopping or changing directions.

Mike

[robhrzic]

C001=00 gives forward from terminal 1
C002=01 gives reverse from terminal 2
A001=00 uses the onboard pot for frequency control
A002=01 allows use of the terminals instead of keypad for forward and reverse.

TOTALLYRC, JimP, thanks for your time and input.

This is exactly how I set the parameters of the L200. I even double, then triple checked everything, but nothing happens. I've tried the SK and SR settings with the DIP switch, and nothing happens. And yes, I tried using a short jumper wire from the PCS terminal, and terminal #1 (and #2) and nothing happens.

I also have it configured (using the F002 and F003 parameters, I believe) to ramp up acceleration in 3 seconds, and deceleration in 3 seconds. Again, it works fine when using the contol panel Run button, Stop/Reset button and potentiometer (setting A002=02 and bypassing the mill's switch altogether). It's just that you can't reverse the motor very easily, or chane from Hi range to Lo range very easily.

I did find out that if you jumper the PCS terminal to the L terminal (like the manual tells you to do), it trips an error code and the unit resets itself with a loud click. So I know I have voltage at the terminal block.

I also have one of these exact same units installed on my wood cutting bandsaw, to make it a variable wood / metal cutting bandsaw. It works great, though I have mine configured to use the control panel and potentiometer to adjust the speed (Hz) of the motor.

I tried the same thing (configuration and parameter settings) with my inverter, and I get the same (lack of) results. That's why I thought that I must be missing something, or do not have something configured correctly. I find it hard to believe that both units are somehow defective, and / or can not be configured according to the manual.

I was hoping to find someone here, on this forum, that has had success doing what I am trying to do, with the same unit / model, so that I could get some input. I thought about contacting www.driveswarehouse.com, where Ipurchesed the unit, but I found out that Hitachi has discontinued this model. Wonder why?

It doesn't seem like it should be this difficult according to the instructions.
I just can't seem to figure out how to get it to work.

[mactec54]

Hi robhrzic

You may have smoked the circuit as the manual tells you not to short PCS to L terminal
it is in section 4-6 that may be the reason that they do not work you may have smoked the circuit on the first try

[TOTALLYRC]

Hi robhrzic.

It looks easy but it can take awhile to get it dialed in.
The only other thing I can think of is to make sure that c02,c03,c04 and c05 are not at either 00 or 01.

Otherwise it looks like you have it hooked up properly. Just to be safe you could always try an external 24v power supply.

Let us know if you get it sorted out.

Mike

[bemfarmer]

How about a Reset?

[robhrzic]

I have performed a reset a couple of times already, with the same results. The unit still operates the same way as it did before the reset.

I don't think that the circuitry was damaged, by shorting the PCS terminal to the L terminal. All it seemed to do is trip a breaker, and reset itself. Besides, I did not do that (short PSC to L) on my bandsaw's VFD, and it operates exactly in the same manner as the other one does.

If I were to use an external 24V power supply, what type could I use? How would I make the connection? If I understand it correctly, I would connect the (+) side to the C001 or C002 terminal. Where would I connect the (-) side to? The L terminal?