Mannesmann ecodrive03, Troubleshooting Manual

Page: 42 / 128

3-16 Description of diagnostic letters F... and E... ECODRIVE03 SMT-02VRS
DOK-ECODR3-SMT-02VRS**-WA01-EN-P
F402 Double MDT failure shutdown
The master data telegram (MDT) has not been received in the drive over
the course of two successive SERCOS or fieldbus cycles.
Cause:
1. Fiber optic bus: interference in the fiber optic transmission
2. Fiber optic bus: light signal input power too low
3. SERCOS: problem in SERCOS interface (general)
4. Fieldbus: bus connection terminated/blocked longer than
watchdog duration
5. The bus master is no longer sending cyclic telegrams to the
drive, although they are expected in phase 4.
Remedy:
On 1. All fiber optic cable connections in SERCOS ring must be
checked.
On 2. The fiber optics power read at the receiver (test mode:
continuous light) must lie between the range of –20dBm (10µW)
and –5dBm (320µW). If it does not, then adjust transmission
power or check attenuation of the fiber optic cable (maximum
attenuation between TX and RX may not exceed 12.5 dB!)
On 3. SERCOS interface module in drive has to be replaced.
On 4. Check fieldbus connector and cable connections, signal level.
On 5. Switch master on and start up cyclic communications, see
Control Manual.
See also Function Description: "SERCOS Interface Error"
F403 Invalid communication phase shutdown
An invalid communications phase was given by the SERCOS master
module (phase > 4).
Cause:
Error in the SERCOS master module of the control system.
Remedy:
Consult the control system manufacturer.
See also the functional description: "SERCOS Interface Error"
F404 Error during phase progression
The prescribed order was not maintained during phase progression.
Cause:
Error in the SERCOS master module of the control system.
Remedy:
Consult the control system manufacturer.
See also the functional description: "SERCOS Interface Error"