UMI-7774 Axis1 Inhibit input/output (and Fault +/-) to corresponding Servo Drive signals

[M0Reng]

Hi,

I have servo drive (yaskawa sigma fsp) that i configured to work in Position command mode,

And i want to connect it to UMI-7774 with PCI-7344 also configured in MAX to work in P-Command mode.

The Servo drive has these signals:

/S-ON    (Servo ON input)

ALM+    (Servo alarm output)

ALM      (Servo alarm output)

The UMI-7774 on its Control Connector of Axis1 has these signals:

Enable

Fault+

Fault-

i read the umi7774 manual and also the servo drive manual, and didnt understand all the things because

the umi7774 manual named the signals Inhibit-input, inhibit-output

but there is no signals in this name on the UMI-7774/Axis1/Control Connector.  

So, i think the wiring i need to make is :

[Servo Drive] /S-ON   < to >  [UMI-7774/Axis1/Control Connector]  Enable 

[Servo Drive] ALM+   < to >   [UMI-7774/Axis1/Control Connector]  Fault+

[Servo Drive] ALM      < to >  [UMI-7774/Axis1/Control Connector]  Fault- 

is [UMI-7774/Axis1/Control Connector]  Enable  is same as Inhibit-Output ?

what about the inhibit-input, is the ALM+ from the drive is acting this role ?

And, because the servo drive and the pci7344 configured to P-Command (Position command) mode,

The control signals is connected in this way :

[Servo Drive] PULS      < to >  [UMI-7774/Axis1/Control Connector]  Step (CW) 

[Servo Drive] /PULS     < to >  [UMI-7774/Axis1/Control Connector]  Digital Ground

[Servo Drive] SIGN       < to >  [UMI-7774/Axis1/Control Connector]  Dir (CCW)

[Servo Drive] /SIGN      < to >  [UMI-7774/Axis1/Control Connector]  Digital Ground

And for the feedback connector :

[Servo Drive] PAO      < to >  [UMI-7774/Axis1/Control Connector]  Encoder Phase A

[Servo Drive] /PAO      < to >  [UMI-7774/Axis1/Control Connector]  Encoder Phase A-

[Servo Drive] PBO      < to >  [UMI-7774/Axis1/Control Connector]  Encoder Phase B

[Servo Drive] /PBO      < to >  [UMI-7774/Axis1/Control Connector]  Encoder Phase B-

[Servo Drive] PCO      < to >  [UMI-7774/Axis1/Control Connector]  Encoder Index

[Servo Drive] /PCO      < to >  [UMI-7774/Axis1/Control Connector]  Encoder Index-

i read the ni-motion manual,pci-7344 and umi7774 manual and also the articles about configuring the Position Command mode

including the MAX setting.

i finally start to understand the setting after i read the PCI7390 which is position-comannd controller.

i just need to know if what i write here is correct.

(The servo drive manual is here:

  http://www.yaskawa.com/site/products.nsf/products/Servo%20Amplifiers~fspsigma.html?openDocument&seq=... )

Last thing,  the  "How to connect the 73xx inhibit and command signal outputs to third party drives"  article

(http://zone.ni.com/devzone/cda/tut/p/id/3442 )

shows that we need resistors etc.. to connect the signals between the servo drive and umi-7774,

can i directly connect the signals using Pigtail cables the National instruments provide?

Thanks

Moti

[seVEMes]

I had a hard time trying to understand the connection diagrams from your servo drive. In fact it still does not make sence to me. But I understand the UMI-7774 and you are right that the enable output is the same as the inhibit output, except with the opposite polarity. The inhibit output is an output line from the controller. The inhibit input is an input of the UMI-7774 from the motor drive, which for the 7774 is the fault lines. When the fault lines are asserted the UMI will kill the axis.

So, I would assume, from your description of the servo drive's three lines, that you are right about this:

[Servo Drive] /S-ON   < to >  [UMI-7774/Axis1/Control Connector]  Enable 

[Servo Drive] ALM+   < to >   [UMI-7774/Axis1/Control Connector]  Fault+

[Servo Drive] ALM      < to >  [UMI-7774/Axis1/Control Connector]  Fault-

 

As for the rest, I could not understand your drive's connection diagram labeling. I would assume that you, after having read and understood your manual, are right about the rest as well.

[M0Reng]

Dear Vince,

this is the description from the servo drive manual about the following signals:

[Servo Drive] PULS  (Reference pulse input)

[Servo Drive] SIGN   (Reference pulse input)

[Servo Drive] PAO   (PG divided output A-phase)  same for PBO,PCO

i understand the following connection that i write here (for control and feedback)

from the PCI 7390 users manual (Table B-7 on Page  B-15 : CN1 cable pin assignments)

the table shows the signals from the MCA-7790Y which is accessory

for connecting the pci7390 to Yaskawa Sigma 2 drive (which is the same as Yaskawa Sigma FSP drive).

So, is that the correct connections for using the umi7774 and this servo drive in position command mode ?  :  

[Servo Drive] PULS      < to >  [UMI-7774/Axis1/Control Connector]  Step (CW) 

[Servo Drive] /PULS     < to >  [UMI-7774/Axis1/Control Connector]  Digital Ground

[Servo Drive] SIGN       < to >  [UMI-7774/Axis1/Control Connector]  Dir (CCW)

[Servo Drive] /SIGN      < to >  [UMI-7774/Axis1/Control Connector]  Digital Ground

And for the feedback connector :

[Servo Drive] PAO      < to >  [UMI-7774/Axis1/Control Connector]  Encoder Phase A

[Servo Drive] /PAO      < to >  [UMI-7774/Axis1/Control Connector]  Encoder Phase A-

[Servo Drive] PBO      < to >  [UMI-7774/Axis1/Control Connector]  Encoder Phase B

[Servo Drive] /PBO      < to >  [UMI-7774/Axis1/Control Connector]  Encoder Phase B-

[Servo Drive] PCO      < to >  [UMI-7774/Axis1/Control Connector]  Encoder Index

[Servo Drive] /PCO      < to >  [UMI-7774/Axis1/Control Connector]  Encoder Index-

thanks for your reply , i appreciate your help

since i'm alone in this, unfortunately i cant get help on this issue from anyone.

Please verify that what i write here is correct.

Regards,

Moti

[seVEMes]

Moti,

From that description it sounds right. The worst thing that could happen is that after hooking it up it doesn't run. It will not burn out the drive or do other damage. Their may be an issue if your drive requires sinking or sourcing but either way you won't have any problems burning anything out.

[M0Reng]

Thnak you Vince,

sinking or sourcing is the next thing that i need to learn about this wiring to the servo drive.

i guess after understanding the wiring signals, i go to wiring itself.

thank you