Siemens SIMATIC TI500 Manual de usuario descargar pdf (Pagina 38)

Gateway Installation and Configuration

3-10

TIWAY I Gateway User Manual

3.3 Switches and Indicator Lights

I000000

Reset

Self-Test

Online/Offline

Online

Offline

Figure 3-5 Gateway

Operation Switches

The Online/Offline switch, when placed in the Online position, allows the

Gateway to communicate with the network and the other systems connected

to the Gateway

. In the Offline position, the Gateway is disconnected from

the network. This prevents access to the network while secondaries are

being changed or while maintenance is being performed. The position of this

switch is read before each communication cycle, so a reset of the Gateway is

not necessary each time the Online/Offline switch position is changed.

The Self-T

est button initiates a set of Gateway diagnostic tests, including a

standalone Gateway communications loopback test. This test requires a

special hardware set-up, using the loopback connector supplied with the

Gateway

. This procedure is described more fully in the section on Diagnostic

ests. The Gateway must have the Online/Offline switch in the Offline

position to initiate the diagnostic tests.

Pressing the Reset button causes a hardware reset of the Gateway and

initiates the power

-on diagnostic test. The power-on test is explained in

more detail in the section on Diagnostic T

ests.

Online/Offline

Switch

Self-T

est Button

Reset Button

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Siemens SIMATIC TI500 Manual de usuario Pagina 38