Yaskawa Wirings

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Rolquin
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Yaskawa Wirings

Post by Rolquin »

Hi Guys would you provide some help or maybe a schematic for the Yaskawa SGDA - P Step / Dir Drives.

I was looking at the schematic provided in the Acorn documentation for Yaskawa Sigma 5 , Im a little bit confused about if I should wire in the same way.

In the SGDA the pins # are 1,2,3 and 4.

So Im not sure about wiring :

PIN 1 Pulse to 24 VDC with the pull resistor
PIN 2 * Pulse to ST1 on Header H2

PIN 3 Sign to 24 VDC with the pull resistor
PIN 4 * Sign to DR1 on Header H2

Please any help ?

Thanks.
Rolquin
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Re: Yaskawa Wirings

Post by Rolquin »

Hi Guys any thought about this ?

Was looking at the SGDA Drives schematics and believe that the right configuration may be :

Pin 1 Pulse to the ST1 on Header 2

Pin 2 *Pulse to the COM on Header 2

Pin 3 Sign to the DR1 on Header 2

Pin 4 * Sign to the COM on Header 2

Does it make more sense ?

Thanks.
cncman172
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Re: Yaskawa Wirings

Post by cncman172 »

The Yaskawa servo drive has differential inputs for step and direction. The Acorn outputs single ended signals step and direction. The amplifiers can also be driven single ended by pulling the +step and thr +direction high usinga resistor. The other approach is to get a board that takes single ended inputs and converts them to differentials outputs. If you download the Yaskawa manual and look at how it can be driven for positional control you will see a simple schematic. Bottom line is the Centroid schematic is correct.

Russ
Rolquin
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Re: Yaskawa Wirings

Post by Rolquin »

Hi Russ , thanks for you answer

I apologize for the way I approached in this topic , I understand its difficult get the idea without enough information and the proper schematics when are needed.

Im still a little bit confused about the voltages for the output on the H2 Acorn TB. As the field voltage is 24V , also confused with the 24V applied to the drive to CN1.

I have attached an screenshot from the Yaskawa Sigma series manual TSE - S800 , where there is an example for this connection.

Also I have attached a rough schematics , showcasing what I have understood.

Please have a look at the attachments and let me know if this is the proper way , I know this is easy but Im still confused.

Thanks.

SGDA.jpg
The attachment SGDA + ACORN.jpg is no longer available
cncman172
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Re: Yaskawa Wirings

Post by cncman172 »

Your drawing is wrong, sorry.

The drawing in the Yaskawa manual is exactly correct. In that drawing the controller is the Acorn. The Acorn has open collector outputs and the servo drive has an optocoupler input. This basically means the Acorn will provide the power to turn on the LED of the optocoupler in the Yaskawa drive.

Your drawing showed you connecting COM to step and Dir negative is wrong.

The Step and Direction of Acorn must connect to the Step- and the Dir-

The Step+ and Direction+ of the Servo drive are pulled high to 24v via a resistor.

Look at the Yaskawa drawing carefully and you will understand.


Russ
Rolquin
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Re: Yaskawa Wirings

Post by Rolquin »

Hey Russ , So basically , you are saying I should consider the same connection for the Sigma 5 and the SGDA ?

This means that the only changes would be the pin numbers loactions.

Its look like I was trying to re invent the wheel , got confused by the Pins Orientation. :lol:

I think Im clear now.

Thanks.
cncman172
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Re: Yaskawa Wirings

Post by cncman172 »

Your connections should look like the following

ACORN -----> YASKAWA SGD-02-AP type driver

+24V --- 2.2K resistor ----1CN-1
ST1 -----> 1CN-2
+24V --- 2.2K resistor --- 1CN-3
DR1------> 1CN-4

It is important you put the 2.2K resistors on the two pull up points so you do not burn out the opti-couplers in the Servo driver. Keep in mind the signals from the Acorn are just turning on a tiny LED inside the Servo Drive, so you must limit the current. If you use a lower voltage power supply you can reduce the size of the resistors for example if you used a 12V supply it could be 1K resistors. I show it using 24V because the Acorn comes with a 24V power supply. Hope this helps.

Russ
Rolquin
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Re: Yaskawa Wirings

Post by Rolquin »

Hi Russ ,

You answers has been very helpful for me, many thanks.

As the Yaskawa manual examples are for 5V or 12V open collector I was afraid about the 24V coming from the Acorn ,
now I understand with the 2.2K resistor should not be any problem.

Do you have the power ratings for the resistor ?

Im working on my on schematic, even though Centroid it pretty clear,
just want to isolate my components and maybe use an external 24V power supply the Drives.

Thanks.
cncman172
Posts: 254
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Re: Yaskawa Wirings

Post by cncman172 »

Standard 1/4w resistors will work fine, even 1/8w there is very little current these are just pull up resistors for the Open Collector transistors. Yes, do not forget the resistors or you will discover you have burn't out the OptoCouplers inside you servo drives. Keep in mind you are turning on very tiny LEDs inside the optocoupler.


Russ
Rolquin
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Re: Yaskawa Wirings

Post by Rolquin »

Hello Russ

Many thanks for your help.

So far everything is working properly on my workbench test for my first Drive.

I do have still some questions you may be able to help me with.

1 ) Following the schematic for Yaskawa Drives, the Alarm Reset pin is hook to the terminal block H5 on OC6 output. What will happen with the other drives ? will I have to use OC7 , OC8 and so on ?
Is this an output that can be share for all drives?

I could notice the same output been use for a VFD in other squematic.

2) Talking about Drive fault, as Im not using the Drive Alarm pin 34 & 35, what will happen if the Drive faults ? How the Arcon will behave ?

3) Would you suggest wiring the Alarm pin in series with the Estop 24vdc circuit ?

Thanks
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