Siemens SIMATIC TI500 Manual de usuario descargar pdf (Pagina 41)

Gateway Installation and Configuration

3-13

TIWAY I Gateway User Manual

You

should run the user

-initiated test only when the Gateway is in Off-line

mode (that is, when the On-line/Off-line switch is in the OFFLINE position).

Normal Gateway operation is suspended during this test mode.

NOTE: Before initiating the diagnostic routine, make sure that the network

and host computer cables are disconnected from the Gateway

, and that the

Gateway is in off-line mode. Only the GA

TEWA

Y GOOD indicator should be

lit. If ONLINE is lit, you must first reset the Gateway before running the

test.

Install a loopback connector on each RS-232-C port; (without one, the

port will fail the external loopback subtest). T

able 3-4 shows the signal

line connections made by the loopback connector

able 3-4

RS-232-C/423 Loopback Connections

Pin # to Pin # Signal to Signal

2 3 Data out Data In

4 5 Request to Send (RTS) Clear to Send (CTS)

20 6,8 Data Terminal Ready (DTR) Data Set Ready (DSR) /

Data Carrier Detect (DCD)

2. Press

the SELF-TEST button to start the user

-initiated test.

The diagnostics will perform internal and external loopback, jabberstop*,

and data rate subtests to each channel. If a media card is missing or is bad,

the test will fail. The subtests for the user

-initiated diagnostic test include

the following.

•

RAM data and address line verification (internal and external RAM)

•

ROM integrity using CRC and checksum

• Serial

Communications Chip (SCC) using internal loopback and baud rate

• Transmitter/Receiver

via external loopback and jabberstop

• V

erification of watchdog timer

•

Indicator operation

*The

jabberstop is a Gateway feature which prevents a device from monopolizing the network.

User-Initiated

est

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Siemens SIMATIC TI500 Manual de usuario Pagina 41

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