Siemens SIMATIC TIWAY 1 User Manual download pdf (Page 60)

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Diagnostic T

ests and T

roubleshooting

5-5

If the Peerlink module fails one of the user

-initiated diagnostic tests

routines, the front panel indicators will light as described in the following.

LED Description

MODULE GOOD

Lights when the module passes the ROM and RAM

integrity tests.

P/C COMM GOOD

Lights when the module passes the communications

integrity tests.

TRANSMIT

Lights (with the RECEIVE LED) when Channel A

passes the integrity tests.

RECEIVE

Lights when Channel B passes the integrity tests.

When the TEST indicator begins flashing, the user

-initiated diagnostic

routing is complete. If the Peerlink module fails more than one test, more

than one indicator will be off.

In the power

-up diagnostic routine, the user

-initiated test, and the

operational test, the outcome of the P/C COMM test depends upon the

status of the P/C. If the P/C is in a fatal error mode, the Peerlink module

interprets this as a P/C COMM test failure. If the P/C COMM indicator is

off at the end of the test, before assuming that there is really a P/C COMM

error

, you should make sure that:

V Memory starting address is valid

P/C is not in a fatal error mode

Connection between the module and the P/C is secure (Check that any

keys used are in the proper slot in the base, and that the module is

firmly seated and latched in place)

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Siemens SIMATIC TIWAY 1 User Manual Page 60