S120 Homing with Telegram 111

Hello everyone,

I am working with a CU310-2 PN and a S7-1200 in Profinet. I would like to use the FB SINA_POS so I have to use Telegram 111. The limits switches are connected to DI0 and DI1 on the CU. I would like to launch a homing from the PLC (ModePos = 4) but I can't set the p2612 in starter as my Negative limit switch because the signal comes from the telegram.

Shoul I understand that I have to connect the limits switches on my PLC and sent them to S120 via telegram ? Or is there an other solution.

Thanks for reading and answering.

Ok so I found how to do this but I don't know if it's conventionnal.

I have put the r722 (Signal Digital Inputs on the CU) in the last sent PZD (S120 point of view) and I retrieve in TIA Portal my two sensors (Positive cam wired on DI0 and Negative Cam wired on DI1) in bit 0 for DI0 and bit 1 for DI1.

In mode 4 (see SINA_POS input), when the Negative_Cam is activated I activate the bit 6 (Reference_Cam) from the EPOS_Config DINT of the SINA_POS FB (in the Siemens tutorial about SINA-POS it say that the Reference Cam is in bit 7 of the EPOS_Config DINT but it's wrong, it's bit 7 => check inside the SINA_POS FB).

The Homing is now workking well on my Linear axis.

If somebody has a better way to do this with SINA_POS FB he is welcome, if someone has questions he is welcome also.

Hello,

I prefer to connect the digital Input directly on the drive if you want to do a homing with digitalinput and Zero pulse. 

For example I connect

p2612 = ControlUnit.r722.0  // Digitalinput DI0

For that you have to Change to "free bico" after selecting Telegramm 111. So the rest of Telegramm111 keeps connected.

Zako

zako_

Hello,

I prefer to connect the digital Input directly on the drive if you want to do a homing with digitalinput and Zero pulse. 

For example I connect

p2612 = ControlUnit.r722.0  // Digitalinput DI0

For that you have to Change to "free bico" after selecting Telegramm 111. So the rest of Telegramm111 keeps connected.

Zako

 Hi Zako,

That's the thing I was looking for !

Because I haet to transfer the Sensor state to the S120 because it's not hardware so it's not clean and it's stupid because the S120 has the signal.... But it was not possible to connect something on P2612 with telegram 111 that's why I made this strange homing solution.

I didn't think that I can use the free telegram 999 with SINA_POS so I put this telegram away from the solution. I have to test your solution but it seems to be THE solution for me.

Thanks again for your reply.