Siemens EF 837 Series Dokumentacja Pobierz pdf (Strona 53)

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Section 5 Maintenance/Replacement of

Faulty Units

Online Replacement of Unit

Replacement online entails adding or removing units in a controller without

disturbing the execution of the running application program. Units are connected to

the CEX-Bus and the electrical ModuleBus (S800 I/O).

CEX-Bus

Communication interfaces () Can be removed or replaced online

Restrictions apply; refer to the installation section

for each interface.

Base plates for CI8xx (TP8xx) It is not allowed to manipulate CEX bus base

plates in a powered and running system. Before

changing or removing a base plate, all CEX

modules on that segment must be removed.

ModuleBus

S800 I/O units Can be removed or replaced online. (Not S800L)

Module Terminal Units (MTUs) Must not be replaced online

Redundant CPUs

Processor unit Can be removed or replaced online by following a

specified sequence (see the next following pages)

1 2 ... 48 49 50 51 52 53 54 55 56 57 58 ... 67 68

Brak uwag

Siemens EF 837 Series Dokumentacja Strona 53