Siemens SIMATIC TI500 Spezifikationen PDF herunterladen (Seite 273)

100

101

Upgrading Existing Series 500 Installations

C-14

SIMATIC 545/555/575 System Manual

Installing a PPX:500–5114–A RBC (continued)

When I/O channel communication to a base is lost, the state of the outputs

is determined by the selection made on the RBC (Off/Freeze) switch. See

Figure C-6.

FREEZE

OFF

(factory set)

Figure C-6 Series 500 RBC Switch Selection

For discrete output modules, the state of the outputs is determined solely by

the position of the RBC (Off/Freeze) switch.

For analog/word output modules, the state of the outputs is influenced not

only by the position of the RBC (Off/Freeze) switch but by the output

module’s (Zero/Hold Last Value) selection, if the module has that option. See

Table C-1.

Output State

Selection

1 2 ... 268 269 270 271 272 273 274 275 276 277 278 ... 321 322

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