Adding new IO module on existing Cluster AC800M 800xA
Dear Sir,
Is it possible to add IO module on existing cluster when online (Production)- AC800M 800xA?
we are using CI840A for commnication interface.
IO Modules to be added are AI845 and DI840.
Thanks
regards
Wahyu M
Is it possible to add IO module on existing cluster when online (Production)- AC800M 800xA?
we are using CI840A for commnication interface.
IO Modules to be added are AI845 and DI840.
Thanks
regards
Wahyu M
Asked 10 months ago
Voted best answer
3
Well, yes it's "possible" - but there's no guarantee that it wont upset production.
Things that can go wrong .....
- On older versions of xA ( eg version 4.1) the Profibus can just stop if you change the IO configuration. This seems to have been resolved on later releases and I haven't seen problems on Version 5 systems onwards. However, whenever you make changes to a profibus configuration there will always be a short interruption while the bus is reconfigured. "Usually" this isn't an issue but some devices with very short timeout values may go to safe state.
- On an existing Cluster you need to add additional MTU's which means removing the MTU terminator and slotting 2 more MTUs onto a running cluster. Again, this "usually" works but no guarantees. The IO Cluster might stop while the terminator is missing.
- You probably need to provide power from the existing MTU to the new MTU's, so there's a better than zero chance the 24V power supply will get shorted by mistake.
If you can handle the above potential problems, then sure - you can give it a try. But its not recommended.
Things that can go wrong .....
- On older versions of xA ( eg version 4.1) the Profibus can just stop if you change the IO configuration. This seems to have been resolved on later releases and I haven't seen problems on Version 5 systems onwards. However, whenever you make changes to a profibus configuration there will always be a short interruption while the bus is reconfigured. "Usually" this isn't an issue but some devices with very short timeout values may go to safe state.
- On an existing Cluster you need to add additional MTU's which means removing the MTU terminator and slotting 2 more MTUs onto a running cluster. Again, this "usually" works but no guarantees. The IO Cluster might stop while the terminator is missing.
- You probably need to provide power from the existing MTU to the new MTU's, so there's a better than zero chance the 24V power supply will get shorted by mistake.
If you can handle the above potential problems, then sure - you can give it a try. But its not recommended.
Answered 10 months ago
Answers
0
You cannot disturb the existing cluster online. Adding Communication interface need to be synced with controller which requires an reboot.
Answered 10 months ago
2
you are not supposed to disturb the electrical modulebus when it's online. so if you have the MTU already in place for these AI854 and DI840 modules, you can install these modules online, but if the MTU are not there and you'll have to add them now, then no, you can't do that online. you can find more info on this in "3BSE020924" and "3BSE020923".
Answered 10 months ago
0
yes possible, but with certain risk associated with it--Not a standard practice.
You have to weigh your benefits against the risk .
Certain errors on CI can penetrate to controller and stall it.
@Rob has already mentioned few
You have to weigh your benefits against the risk .
Certain errors on CI can penetrate to controller and stall it.
@Rob has already mentioned few
Answered 10 months ago
1
If you are using the CI840, the cluster are not connected directly to the module bus of the controller, the CI840 is the Profibus DP Master of the clusters and an Slave of the CI854.
we did it one time in 800xA 5.1 FP4 version, the controller was the PM866, and the controller don't lose the connection, the system was exactly as you comment , with CI840 in the circuit.
Remembering, the max number of Cluster per CI840 is 12 ( Without redundancy).
we did it one time in 800xA 5.1 FP4 version, the controller was the PM866, and the controller don't lose the connection, the system was exactly as you comment , with CI840 in the circuit.
Remembering, the max number of Cluster per CI840 is 12 ( Without redundancy).
Answered 10 months ago
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