Siemens SIMATIC TIWAY 1 Manual de usuario descargar pdf (Pagina 54)

Installation

3-17

TIWAY 1 Ti505 NIM User Manual

3.6.1 Power-Up

Diagnostics

The TI505 NIM executes the power

-up diagnostics in the following cases:

 Immediately

following the application of

+5VDC from the I/O base (power

-up) as

part

of its initialization



Any time the Reset switch is pressed

 Following

an HDLC DISC command from the Primary (A UNILINK Adapter can

be configured to disallow the disconnect command. See the UNILINK Host

Adapter

User

’

s Manual

for additional information.)

The power-up diagnostics checks the processor, performs a test of on-board RAM and

ROM,

and performs an internal loopback test of the communication ports. At the start of

execution, all NIM LED indicators are turned on for approximately 1 second, then all

except

the TEST indicator are turned off for approximately 10 seconds.

If the power-up diagnostics are successful, the NIM GOOD LED will be on, and an

attempt

to establish communication with a TI505 P/C will be

made. If this is successful,

the

PC GOOD LED will illuminate and the

NIM is ready for normal network operation.

If the power-up diagnostics fail, the NIM will not respond to any communications

attempts

and the TEST LED will remain on.

the TI505 P/C does not respond, the PC GOOD LED will remain extinguished, and the

NIM will issue an Exception Response with Error Code 1A (communication not

established

with attached device) to any Primary initiating a P/C interactive command

this NIM.

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Siemens SIMATIC TIWAY 1 Manual de usuario Pagina 54

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