M580 HSBY problem with swapping between A and B

[gretarmark_]

Hi there,

I have two "M580 HSBY CPU LEVEL 2 FOR R IO - BMEH582040" and have been trying out the swapping feature of the units.

The first CPU is set to A and the second one is set to B. CPU A is running the main program and I wanted to see if the swapping feature works by disconnecting the electricity to CPU A and see if it will swap automatically to CPU B. Unfortunately, it did not work.

Do you have any idea what to do?
Do I need to do some programming for it to work?
I thought it was all bult-in.

Best regards,
Grétar

[Siddiqui]

Hi,

Check my comments below:

It would be great if you share the architecture so at least I can evaluate how the system is connected from which port to which port. I am also not sure whether you are using RIO drop with HSBY CPUs or not.

To start the investigation I would suggest the following:

1. Make sure the synch link between the CPU is connected and healthy while looking into the LED next to the synch port in each CPU.
2. It is recommended that the supplementary link between two CPUs is also connected and healthy.
3. I suggest you start the basic testing between the 2 CPUs itself first.
4. You do not need any logic because you completely Power off one of the CPUs, so the second one should take over the control. I also recommend you start with the empty program.
5. Before you start the swap make sure the following:
   1. At the hardware level, both CPUs got the same firmware version.
   2. One CPU is A and the other CPU is B.
   3. One CPU is in primary mode and RUN state and the other CPU is in standby mode and RUN state. Verify this with each CPU LEDs.
   4. Connect the CE (Control Expert) with the Primary CPU and check the status bar it should show something like Primary/Standby/equal etc.
   5. If everything is OK until here then Power OFF the Primary CPU and see the reaction on the Standby CPU, it should take over the Primary role automatically.
6. Additions comments:
   1. From the CE setup file find the folder “Extra” and there is another folder “Operator screen” You find the file for the HSBY status you can import this file into your project and it will give you all the statuses from the single screen. It will help you start the debugging.
   2. You can go to the tool and open the “Diagnostics viewer” It will give more clues about what is happening with the system.

If you can provide more information then it easy for me to help you with the troubleshooting, But I hope with the above comments at least you can initiate the investigation. Check the attached file for the snapshots these are only for reference purposes.

Best Regards,

Wasif

[gretarmark_]

Dear Wasif,

Thank you for a great answer!

The firmware in both CPU A and B is the same, V3.20

CPU A is in RUN mode, it has both PRIM and STBY LED on
CPU B is in RUN mode, it has both PRIM and STBY LED off

At my testing bench, I am using 4slot rack for CPU A and 8slot rack in CPU B but where the CPUs will be placed, it will have two 4slot racks. In my Control Expert program I have 4slot rack for both, I'm not sure if that matters. I also don't have all units connected to the rack in reality.
One rack includes power supply, M580 and NOS0300 the other rack includes only power supply and M580.

When I use the opperation screen in Control Expert, I get HSBY link error.

I have attached figures of the setup.

Best regards,
Grétar Már

[Siddiqui]

Hi Gretar,

Thank you for updating the status and check my comment below:

It would be great if you share the snapshot of the M580 HSBY operator screen status while connecting live to the CPU.

One CPU must be in the Primary state and the other one should be in the standby state. The CPUs are not able to synch as per your shared snapshots. It seems like you are having the HSBY link error issue, I would suggest doing the following:

• Create a new application and just configure the Rack/CPUs and Power supply. Download it into both CPUs. (To start the investigation)
• On the real hardware, I would suggest you remove all the NOS and NOC modules, just RACK, PS, and CPU.
• In my opinion, different lengths of the rack should not create the issue. But it is not recommended.
• For the HSBY setup, the hardware and the firmware of each rack and each module should be identical. But you can proceed with the testing with the current configuration.
• Make sure you insert the SFP sockets properly on both CPUs. The cable used for the HSBY sync connection between the SFPs socket should be in good and healthy condition.
• The Hsby Diag LED next to the SFP socket should keep LIT on. Not in the blinking state. If this is in blinking verify the SFPs socket and sync cable again.
• For the time being, don’t use any Remote drops just 2 CPUs, and use the supplementary link between the 2 CPUs as shown in the attached snapshot. Please create a new program that contains the CPU only to begin the investigation.
• Once the CPUs came into the Primary and Standby state and swaps over correctly then we will proceed with your application along with the RIO drops the connection.  
• Make sure on each rack on the left side the Green LED is lit ON.

Additional request:

• Connect the CPU online with CE and verify the Firmware version (on both CPUs).
• I am not sure how you are connecting the RIO drops (CRA) modules with the CPU, it seems like you are using the service ports of each CPU for the remote IO connection which is wrong, Please use the Port 2 or Port 3 of each CPU for the RIO drop connection.

I hope the above comments will provide help to do the troubleshooting.

Best Regards,

Wasif