IQ-400 not responsive – Communication error with PC

What does IQ-400 not responsive mean?

The Siemens IQ-400 panel is not communicating with the PC software. This can be caused by power issues, incorrect system identification, or problems with the communication cables.

• Red DC Power Indicator LED (D2) is OFF, indicating no power.
• The ID number set on the IQ-400 does not match the PC settings (SW1 switches).
• Communication cabling (RS232/MODEM/RS485/Terminal Server) is faulty or incorrectly connected.
• Temporary system glitch requiring a reset.

Click steps to track your progress.

1. 1

   Verify that the red DC Power Indicator LED (D2) on the IQ-400 is ON. If off, check power supply connections.

2. 2

   Check that the ID number set on the IQ-400 via switches at SW1 corresponds to the ID number configured on the PC.

3. 3

   Inspect all communication cabling (RS232/MODEM/RS485/Terminal Server) for proper connection and integrity.

4. 4

   Remove the battery from the IQ-400 for 5 minutes, then reinsert it and restart the panel.