Siemens SIMATIC TIWAY 1 User Manual download pdf (Page 58)

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Diagnostic T

ests and T

roubleshooting

5-3

5.1.3

User-Initiated Y

ou may wish to run the user

-initiated test, which is a more

Diagnostic T

est

extensive diagnostic routine than the other two tests described earlier, as

part of a preventive maintenance program. You should only run the test

when the Peerlink module is off-line, since the test will disrupt the system

operation.

CAUTION

Remember to physically disconnect the Peerlink module from the

network before starting the user-initiated diagnostic test. Failure to do

this will cause a temporary communication error on the network.

o run the user

-initiated test, disconnect all of the network connections

from the module. Open the front access door and place the RUN/TEST

mode switch in the position for TEST mode. Press RESET

. The test will

begin executing. See Figure 5-1.

This test will perform both internal and external loopback, jabberstop, and

baud rate sub-tests to each channel. If a media card in the Peerlink module

communications is faulty

, the test will fail.

While the user

-initiated diagnostic test is running, the TEST indicator will

be lit and all other indicators will be off. If the test has been completed

successfully

, all the indicators will flash in unison three times. Then, if all

indicators except for ONLINE stay lit while TEST flashes, the Peerlink

module has passed the diagnostic routines. The module will not resume

operation, however

, until you re-connect the network cables, place the

RUN/TEST switch in the RUN mode, and press the RESET button on the

module. After RESET is pressed, Peerlink will go through the power

-on

diagnostic routine described earlier in this section.

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Siemens SIMATIC TIWAY 1 User Manual Page 58