Function Description Sto; Functional Description Sbc - KEB COMBIVERT F6 Instructions For Use Manual

FUNCTIONAL DESCrIPTIONS

6.2 Function description STO

The safety-related disconnection according to STO is reached by a two-cannel opto-coupler block-
age. The supply of the opto-couplers, which are responsible for the commutation of the connected
drive occurs via transformation coupling of the input voltage. This ensures at input voltage loss that
no supply of the opto-couplers is possible. If the opto-couplers are not longer supplied, no IGBT can
be controlled and thus no energy can be supplied to the drive.
The two channels are reached by way that input STO1 prevents the voltage supply (VTRO) of the
upper opto-couplers of the inverter bridge and input STO2 the lower opto-couplers (VTRU).
The voltage supplies of the opto-couplers (VRTO &-U) are measured safety decoupled by the diag-
nosis CPU and the status is displayed in bits 13 and 14. Only if both voltage supplies are available,
bit 1 (modulation is released) and the output (Status STO) is set.
Technical data of the STO function
Maximum ON delay (U
Maximum OFF delay (U
... active modulation
... inactive modulation until safe state of the driver voltage is reached

6.3 Functional description SBC

The circuit operates on two channels. Thereby brake release is only possible by the control in the
COMBIVERT if both inputs are supplied (SBC inputs see chapter => 4).
The SBC1 input switches the High-Side switch and the SBC2 input switches the Low-Side switch.
The respective brake handling of the axis is activated with co21 bit 4 = 1. This setting is assumed at
power on only. That means, the unit must be switched off and on once to activate the changed param-
eter settings. Output (Status SBC) is set, if the brake is opened at all activated axes.
Technical data of the SBC function
Maximum ON delay (U
Maximum OFF delay (U
26
= 15 V)
IN
=30 V) at
IN
= 15 V)
IN
= 30 V)
IN
< 7 ms
< 15 ms
< 50 ms
< 5 ms
< 10 ms