Monitoring - Siemens SIMOVERT MASTERDRIVES Betriebsanleitung

10.2004
5

Monitoring

Display elements Description of operating state
(LED)
♦ Overcurrent
LED lights up with a short circuit at the output end.
(fault) This fault is not self-acknowledging. You can
acknowledge it by applying and then removing the inhibit
signal.
Correct the short circuit before acknowledging the
fault!
♦ Overload
LED lights up when the overload monitor responds (the
ratio between load and off-load duration is monitored, I 2 t
monitoring); the pulse/pause ratio is limited when the
specified duty cycle is exceeded.
The total continuous braking power (PDB) can be
displayed at any time regardless of the status of the
LED.
The duty cycles shown in Fig. 4-1 (P3/P20) can be
deselected complete only after the LED has gone out.
♦ Overtemp
The LED lights up when the temperature monitor
(fault) responds (ambient temperature too high or cooling air
inlet inhibited).
The fault is automatically acknowledged when the
temperature drops below the critical level again.
♦ Ready
The LED lights up when operating voltage is connected
to the input terminals.
It goes out if the braking unit is disabled via the "Inhibit"
input on control terminal strip X38 or if a temperature
fault (→ Overtemp) or short circuit (→ Overcurrent) has
occurred.
A flashing LED indicates an internal fault in the braking
unit, i.e. the unit is defective.
Siemens AG 6SE7087-6CX87-2DA1
SIMOVERT MASTERDRIVES
When faults occur, the braking unit is inhibited and the transistor at the
fault output blocked (see 3.5 "Control terminal X38"). The appropriate
operating state is indicated by the LEDs on the front panel.
Braking Unit
Monitoring
State of Acknow-
output ledgeable?
transistor
Blocked Yes
Conductive Self-
acknow-
ledging
Blocked No
Conductive Not
applicable
5-1