Dear All,

I have an incremental encoder connected to the ET 200SP Technology Module Posinput1, what do I need to setup and how can I program to read the encoder value? 

Thanks.

Dear Kevinlin,

                      In Which PLC ur Using And Plz Tel me he Order Number . And Plz Mention Encoder Details Also .. How much PPM , And RPM Of motor . . Coupling Type .

                      So that Only We can Easly Help U ..

If I could help you, You can always use Thank and Rate buttons :)

 Regards.

Arasan..

 Dear Arasan,

I was using it together with CPU 1511-1PN, and with distributed IO Interface Module IM155-6 PN. The technology module used was TM PosInput 1. Encoder used was 5 VDC power supply, 100 pulses per revolution, optical sensing method, RS422 interface standard. 

Thank you for the help.

Arasan

Dear Kevinlin,

                      In Which PLC ur Using And Plz Tel me he Order Number . And Plz Mention Encoder Details Also .. How much PPM , And RPM Of motor . . Coupling Type .

                      So that Only We can Easly Help U ..

 

If I could help you, You can always use Thank and Rate buttons :)

 

 Regards.

Arasan..

Hi!

Here is the manual to start with:

simatic-et-200sp-tm-posinput-1

SIMATIC S7-1500, ET 200MP, ET 200SP Counting, measurement and position detection

Hello Kevinlin_5

 Please Click Below Link To programming ..

https://cache.industry.siemens.com/dl/files/820/59709820/att_853768/v1/s71500_counting_measuring_function_manual_en-US_en-US.pdf

And  find the attachement for wiring .

 If I could help you, You can always use Thank and Rate buttons :)

 Regards,

Arasan..

Dear Arasan and Kahl,

            Thank you for the reference given. I'm still not clear withe how to read encoder value. My TM module has an input address from 8 to 23, and output address from 4 to 15.

            According to the manual, there are 12 bytes of control interface and 16 bytes of feedback interface. I guess the control interface is used for the user to program the control of the TM module, and feedback interface is used for the user to get the feedback from the TM module. So to read the encoder value, I need to program the feedback interface.            

            From the manual, I found that the count value is stored at the offset address bytes 0 to 3, so to read the encoder count value, I can read ID8, am I right? But before I can read the encoder count value, do I need to write any program to set the control interface of the TM module, like enable counter? Or I just read from the feedback interface? If control interface is needed to be programmed, where should I program to? Also IB8 to IB23?

           By the way, is there anyway to program the start value of the encoder? I found there is only a 'load start value' in the control interface.

           Thanks.

Important : like manual says ... Do not forget to enable the SOFTWARE GATE !!!

It took me like 4 hours of "grrrrrr" before I realized that without that stupid bit the entire module will remain a piece of plastic...

napraticaautomacao

Where/How do we enable this bit?
Thanks

 Just set it in the interface, as described in the manual.

But as others already stated: Using a technology object (TO High Speed Counter, TO SSI Absolute Encoder or perhaps even motion control TO External Encoder) will most likely be much easier for you, since the TO then takes care about reading and writing the modules interface.

The TO can be seen as some kind of framework that does most of the work for you and makes things easier. Of course you would then need to handle the TO, but as others said, this is an easy job to do.


Cheers,
daviso