Hello GAS2

Good news: Your IM151-3PN (6ES7151 3BA23-0AB0) supports MRP as of Firmware V7.0.

Bad news: Your S7 319-3 CPU (6ES7 318-3EL00-0AB0) with Firmware V2.7 does NOT support MRP (I'm afraid you'll need a newer CPU and a 6ES7 318-3EL01-0AB0 as of Firmware V3.2 does support MRP).

Have a look too at Which IO controllers and IO devices support the following functions: IRT, prioritized startup, MRP, MRPD, PROFIenergy, Shared device, MSI/MSO, I device, Isochronous mode, System redundancy and Option handling? for a nice complete concise list.

To configure which devices are part of MRP and if they are the Manager or a Client, you click on the "PN-IO" port of each device where you'll find a Media Redundancy configuration tab. 

Hello,

no a update is not possible because the HW was changed for FW V3.2.

A switch or Ring manager can't solve the problem because the old FW of the PLC can't be configured in MRP.

Regards

Christoph

A switch could still help providing you can live with the fact that the CPU itself is NOT part of the MRP ring.

For this to work, you use and configure two ports of the switch for the MRP ring (and make the switch the MRP Manager) and have all IM151-3's in this ring as MRP Clients (and make sure you have firmware V7.0 in them).

You then use a third port of the switch and connect it via a patch lead to the CPU.

Hello,

no error & no warning means that you can download the configuration, but nothing about working.

There no part number for the IM because is only FW Versiopn, you can update the IM to FW Version V7.0 , this not changing the Partnumber, only the FW Version, no new IM is needed.

Is not really clear what should working, where you need the Ring exactly?

Regards
Christoph

A CP343-1 Lean (6GK7343-1CX10-0XE0) can only be used as an IO Device but NOT as an IO Controller, so it is NOT going to help you.

You'd need to upgrade it to at least a CP343-1 Standard (6GK7343-1EX30-0XE0) which can be used as an IO Controller. This one though still requires a switch as the MRP Ring Manger since the CP343-1 Standard can only be a Client.

As such you might as well upgrade it to a CP343-1 Advanced (6GK7343-1GX31-0EX0) which can be used as an IO Controller, supports MRP and can be the Ring Manager too. This CP costs some real money though and any usage of any 300 CP as a PN IO Controller requires additional programming effort which you need to cater for (the I/O's will now be in a DB and no longer "native" I/O's, so if your program is already done, you have a bit of rewrite to do).

Personally, I'd just add a switch to your CPU and keep the none MRP capable CPU outside of the MRP ring, but the choice is yours.

As for the required MRP capable IM151-3 PN V7 firmware, you'll find it HERE.