Diagnostics Led; Initializing The Module; Table 8-1 Fault And Status Indication By The Led - Siemens SENTRON PAC RS485 Manual

Alarm, error, and system messages

8.2 Diagnostics LED

8.2 Diagnostics LED
Significance of the diagnostics LED
The diagnostics LED indicates the communication status.
Table 8-1 Fault and status indication by the LED
Color Status
Green and Off
yellow
Green Continuous
Green Flashing
Yellow Flashing
8.3

Initializing the module

Starting communication between the PAC RS485 expansion module and the SENTRON PAC Power
Monitoring Device
1. Power up
2. Initialization phase
3. Starting communication
4. The master is sending data to the SENTRON PAC Power Monitoring Device.
5. The SENTRON PAC Power Monitoring Device is forwarding data to the master.
64
Description
No voltage applied to the
PAC RS485 expansion module
Voltage applied to the
•
PAC RS485 expansion module
The bus is not active.
•
Communication is active on the bus.
The PAC RS485 expansion module
is sending data.
The PAC RS485 expansion module is initialized. The SENTRON PAC Power Monitoring
Device is ready for communication.
The green LED lights continuously.
The green LED flashes.
The yellow LED flashes.
Measure
1. Check that the PAC RS485 expansion
module is correctly connected to the
SENTRON PAC Power Monitoring Device.
2. Switch on the supply voltage to the
SENTRON PAC Power Monitoring Device.
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Manual, 02/2008, A5E02091800B-01
PAC RS485