SI-F/G ComCall

What does CALL mean?

A serial communication transmission error has occurred, indicating that communication has not yet been established. This is typically due to improper connections or user software not configured to the correct baud rate or communication settings, preventing data exchange.

• Incorrect wiring or loose connections on the serial communication terminals (e.g., S+, S-, SG).
• Incorrect communication parameters set in the drive (e.g., Parameter P5-01 (Baud Rate), P5-02 (Data Format)).
• Absence or incorrect placement of termination resistors on the communication bus.
• SCADA or PLC master software not configured with the correct device address or protocol settings.
• Excessive bus length or high electrical noise on the communication line exceeding specifications.

Click steps to track your progress.

1. 1

   1. Inspect wiring integrity at communication terminals (e.g., T+, T-, TCOM) for proper polarity and secure connections.

2. 2

   2. Verify drive communication parameters, such as Parameter P5-01 (Baud Rate) and Parameter P5-02 (Data Format), match the master device.

3. 3

   3. Confirm the presence and correct value (e.g., 120 Ohms) of termination resistors at both physical ends of the communication bus.

4. 4

   4. Check the master device's (PLC/HMI) communication settings, including device ID and port configuration, for consistency.

5. 5

   5. Use a communication analyzer or oscilloscope to monitor data traffic on the serial bus for errors or absence of signals.