TM PosInput 2 - Load value

Would you kindly post a screenshot of the logic for the MOVE blocks used to put the value into Bytes 0-3 and for Byte 8?

From what I read, you load a value to LD_SLOT_0 (Bytes 0-3, QDx+0), then set the right bits in the control nibble for LD_SLOT_0's value (Byte 8, QBx+8 & 8#0F).

When the TM sees a change in byte 8 (the 9th byte in the telegram), LD_SLOT_0 value is then copied to the designated location.

FT82

Hi All,

I'm facing some problems using a TM PsiInput 2 card (6ES7 551-1AB00-0AB0).

I don't want to use technology object, preferring to work with process images available (Control/Feedback interfaces).

I'm trying to pass to the counter CH1 a value using the control interface parameters:

- Slot 0 value (Byte 0-3)

- LD_SLOT_0: combination of the first 4 bits of byte #8, set as 0001 (bit 0 = TRUE)

Everytime I try to pass a value in this way, I see that the "LD_ERROR" bit (byte #12, bit 2 of feedback interface) goes to TRUE, to indicate a loading failure procedure.

First of all, I'm not sure that can be done. I have this doubt because I tried to use also the technology object and I saw that it doesn't have this kind of entries!!!

Is there someone that can help me?

Thank you very much.

Bye

Section 4.1 of the manual uploaded with the first post states there is direct access to the control (and feedback) interface.

Then it shows on page 33 (section 4.4) what bytes within the telegram data mean what.

As long as the TM device is connected and configured properly, it should accept the data presented via the control interface to load a preset value into the count value - but only for incremental or pulse encoder configurations.

Since this encoder is configured as an absolute encoder, it is not possible to load a preset value.

That is why the error is generated when a preset is being loaded.

Absolute encoders know where they are at all times and convey that to the PLC.  Trying to tell an absolute encoder where it is makes no sense because it already knows.

If it is an incremental encoder, the logic used should work.

Kal.A

You load the values by writing the record to the module not by setting the output.

Sorry this will take a bit of time to explain  will write more later if you still need help but there's a siemens example (be it in SCL) for TM modules. It's called something like 2 speed positioning using TM modules.

Here is the example

Hello,

you will find the application example here:

SIMATIC S7-1500: Rapid Traverse/Creep Speed Positioning (2SpeedPositioning)
https://support.industry.siemens.com/cs/ni/en/view/109745386