Siemens CU240S Error A00702: PROFIBUS: no bus detection

Siemens CU240S · taken from the manufacturer’s manual, pages cited

Fault codeA00702

PROFIBUS detected no bus connection, indicating a hardware or cable issue. The manual's first action is: “check the cables and the bus hardware”

Model
Siemens CU240S
Display shows
PROFIBUS: no bus detection (A00702)
Type
Fault code
Source
Manual p. 394

What A00702 means

PROFIBUS: no bus detection p. 394

Common causes

  • connection error, no bus initialization (no master), no clear bus signal, ... p. 394

What to do

  1. check the cables and the bus hardware p. 394

If A00702 is still not resolved

The manual gives no further instruction for this code. Open the code table in the PDF or contact Siemens service.

Open the manual at page 394 All CU240S error codes Manual details & download

This page summarises what the manufacturer’s manual says about A00702; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Siemens. Found a mistake? Report an error.