Diagnostics With The Addressing And Diagnostic Unit; Behavior In The Event Of Faults; Table 4-6: Possible Faults And Fault Handling - Siemens ECOFAST Manual

4.4

Diagnostics with the addressing and diagnostic unit

Diagnostic functions
The addressing and diagnostic unit (Order No.: 3RK1 904-2AB00) has
various diagnostic functions, for example:
• Recognition of incorrect polarity or overload
• Measurement of the AS-i-supply voltage
• Fault recognition with comment
• Indication of peripheral faults
Further information is given in the operating instructions.
4.5

Behavior in the event of faults

Possible faults
Faults and disturbances in the system are dealt with as follows:
Possible fault
Bus fault
Process image fault
Undervoltage AS-i
Undervoltage AUX PWR
Sensor supply - overload
Temperature sensor - overload
Temperature sensor - short circuit
Temperature sensor - wire break
Self-test fault (device fault)
Switching element defective
*)
Fault is automatically acknowledged after elimination of the cause of the fault
(not to be confused with auto reset!)

Table 4-6: Possible faults and fault handling

ECOFAST Motor Starters
GWA 4NEB 950 0562-12
Commissioning and diagnostics
Action Indication / Comment
LEDs
Tripping AS-i
Tripping SF
Tripping SF U < 18 V
Tripping SF U < 18 V
Tripping SF I > 200 mA
Warning/ SF
tripping
Warning/ SF PTC type A
tripping
Warning/ SF
tripping
Tripping SF
Tripping SF
STATE
Reset
*)
Auto
OFF
*)
Auto
*)
Auto
Trip reset
*)
Auto
Auto reset
Trip reset
*)
Auto
Auto reset
Trip reset
*)
Auto
Auto reset
Trip reset
Power OFF
Power OFF
4-7