HMI as Gateway

backbacon

Member

B

Join Date

Aug 2015

Location

Canada

Posts

14

• Oct 7, 2020

• #1

Hey folks,
Is there a way to display a value from plc A to HMI then take that value in the HMI and write to tag in PLC B

The HMI is setup for both PLC's now.
Factorytalk ME
Controllogix and Rslogix5

I've tried If statements in the numeric display but it does not seem to work.

Thanks

 

Ken Moore

Lifetime Supporting Member

Join Date

May 2004

Location

North, West, South Carolina

Posts

3,473

• Oct 7, 2020

• #2

If both have ethernet, why not just message values from one to the other? The CLX can initiate messages to/from a PLC5.

 

backbacon

Member

OP

B

Join Date

Aug 2015

Location

Canada

Posts

14

• Oct 7, 2020

• #3

Rslogix5 is serial to the HMI and no Ethernet to control logix

 

Ken Moore

Lifetime Supporting Member

Join Date

May 2004

Location

North, West, South Carolina

Posts

3,473

• Oct 7, 2020

• #4

You should be able to set up a Macro, where tag1 = tag2.
Then call the Macro.

 

backbacon

Member

OP

B

Join Date

Aug 2015

Location

Canada

Posts

14

• Oct 7, 2020

• #5

macro Test

tagA TagA == Tag B




Then Display settlings start macro Test

then Numeric Display TAG A will have value of tagB


Correct? If so doesn't seem to work

 

Nova5

Member

N

Join Date

May 2013

Location

Northern Snowball

Posts

566

• Oct 7, 2020

• #6

Generally...
== is a comparator. (returns true/false)
= is a math function. (sets target tag to value)

 

backbacon

Member

OP

B

Join Date

Aug 2015

Location

Canada

Posts

14

• Oct 7, 2020

• #7

If my screenshots worked this is what I have done thats not working... I have it looping back to the same plc just for testing.

 

Dravik

Member

D

Join Date

Jun 2008

Location

New York

Posts

1,650

• Oct 7, 2020

• #8

I've done it w/ a button before, probably work as well from a macro.


&Set [ProcessorA]Tag1 [ProcessorB]Tag2;

will set Tag1 to the value currently in Tag2.

 

backbacon

Member

OP

B

Join Date

Aug 2015

Location

Canada

Posts

14

• Oct 7, 2020

• #9

If someone could send me a sample that would be great, nothing seems to work that I'm doing

 

Clatchet

Member

Join Date

Dec 2019

Location

Canada

Posts

39

• Oct 7, 2020

• #10

Machine Edition macros cannot use the &Set function, that only works for Site Edition.

Based on your second image, the format for the macro is as follows:

<Tag> = <Expression>

whereas you are currently trying to equate a value in the expression:

<Tag> = <Tag> = <Tag>

Change it so that only the tag name you are trying to pass over is in the expression field and it should work.

 

backbacon

Member

OP

B

Join Date

Aug 2015

Location

Canada

Posts

14

• Oct 7, 2020

• #11

Clatchet said:

Machine Edition macros cannot use the &Set function, that only works for Site Edition.

Based on your second image, the format for the macro is as follows:

<Tag> = <Expression>

whereas you are currently trying to equate a value in the expression:

<Tag> = <Tag> = <Tag>

Change it so that only the tag name you are trying to pass over is in the expression field and it should work.

Click to expand...

Thank you! I will give it a try

 

backbacon

Member

OP

B

Join Date

Aug 2015

Location

Canada

Posts

14

• Oct 7, 2020

• #12

Well well, it worked, but I think it would have hours ago... I was using "test" display, that must not run the macro. Used test application and it worked right away(multiple setups I had going). Thank you for all the help, case closed.