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Maintenance

12.1 Removing and inserting I/O modules/motor starters (hot swapping)

Distributed I/O system

System Manual, 09/2019, A5E03576849-AJ

235

Removing and inserting I/O module or motor starter with CPU/interface module HF, HS

You can remove and insert any number of I/O modules/motor starters during operation. The

CPU/interface module and the inserted I/O modules/motor starters remain in operation.

NOTICE

Reaction of the CPU to removal and insertion of the ET 200SP server module

Please note that the backplane bus is deactivated when you remove the server module,

regardless of the CPU operating state. Also note that the outputs do not adopt their

configured substitute value behavior when you remove the server module.

This means you should not remove the server module when the CPU is in STARTUP, RUN

and STOP modes. If you have nevertheless removed the server module, perform a

POWER OFF/POWER ON after you have inserted the server module again.

Removing and inserting BusAdapter or CM DP module

Do not remove or insert the BusAdapter or CM DP module when the supply voltage is

switched on. If you have removed the BusAdapter or the CM DP module after CPU startup,

the supply voltage of the BusAdapter or the CM DP module is switched off automatically. To

switch on the supply voltage again, you need to perform a POWER OFF/POWER ON after

inserting the BusAdapter/CM DP module.

Removing and inserting I/O module or motor starter with interface module ST, BA

1. You can remove one I/O module/one motor starter during operation. If you remove

another I/O module/motor starter, this results in a station stop of the ET 200SP distributed

I/O system:

– All I/O modules/motor starters of the ET 200SP distributed I/O system fail → Substitute

value behavior.

– The interface module continues to exchange data with the IO controller and report

diagnostics.

Note

If you want to replace several I/O modules/motor starters during operation, you must

replace them one after the other.

2. If you insert all but one of the I/O modules/motor starters withdrawn during operation, all

I/O modules will start up again.

Note

I/O modules/motor starters inserted in empty slots and then removed are also regarded

as withdrawn during operation.

Siemens SIMATIC ET 200SP System Manual

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