Siemens 125-5050 사용자 설명서

Chaper 4 – Troubleshooting

Siemens Industry, Inc.

BACnet ATEC Owner's Manaul

125-5050, Rev. AA

4/20/2010

Safety Features

The controller board stores the controller's address, applications, and point values. In

the event of a power failure or a reset, these values are retrieved from the controller's

permanent memory and are used by the controller unless overridden by a field panel. If

one of the following conditions occurs, the controller will activate safety features

present in its fail-safe mode.



Sensor failure.



Loss of power. Upon controller power loss, communication with the controller is

also lost. The controller will appear as failed (*F*) at the field panel.

Controller LEDs

NOTE:
The TX and RX LEDs indicate communication over the FLN.

To determine if the controller is powered up and working, verify that the Basic Sanity

Test (BST) Light Emitting Diode (LED) is flashing ON/OFF once per second. The

controller contains seven LEDs located on the circuit board. See the Controller LED

about LEDs.