User manual

FL SWITCH MM HS
4-120
PHOENIX CONTACT 6874_en_09
4.4.3 Starting With Faulty Software (Firmware)
If the software (firmware) installed on the MMS is faulty, you can restore or update the
firmware using an update. Observe the 7-segment display (see also page 1-15).
Procedure:
– Connect the switch to your PC via the serial V.24 (RS-232) interface. Make sure that
your HyperTerminal is configured correctly (see configuration on page 4-116).
– Restart the switch.
Figure 4-54 Screen displayed on HyperTerminal when booting
If the device firmware is faulty, the following message appears:
Figure 4-55 Selection menu for faulty firmware
6 8 7 4 0 0 2 4