Siemens SINUMERIK 840D sl Function Manual page 228

Connecting Sensors/Actuators
7.4 Safe brake test (SBT)
Signal Type
Bclosed I
Axis I
TimerNo I
TV_Btactiv I
TV_Bclose I
TV_FeedCommand I
TV_FXSreached I
TV_FXShold I
CloseBrake O
MoveAxis O
Done O
Error O
State O
Fault IDs
State
0 No error
1 Start conditions not fulfilled, e.g. the axis is not in closed-loop control/brake
closed/axis inhibited
2 When the brake test is selected, no NC feedback in the "brake test active" signal
3 No "Brake applied" checkback by input signal Bclosed
4 No traversing command output (e.g. axis motion has not been started)
5 Fixed endstop is not reached –> axis RESET was initiated
6 Traversing inhibit/approach too slow –> fixed endstop cannot be reached.
Monitoring time TV_FXSreached has expired.
7 Brake is not holding at all (the end position is reached)/approach speed is too high
8 Brake opens during the holding time
9 Fault when de-selecting the brake test
10 Internal fault
11 "PLC-controlled axis" signal not enabled in the user program
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
Type
BOOL Feedback input whether a control signal has been issued to
close the brake (single-channel PLC)
INT Axis number of axis to be tested
TIMER Timer from user program
S5TIME Monitoring time value –> brake test active. Check the axis
signal DBX71.0
S5TIME Monitoring time value –> close brake. Check the input signal
Bclosed after the CloseBrake output was set.
S5TIME Monitoring time value –> output traversing command. Check
traversing commands after MoveAxis has been set.
S5TIME Monitoring time value –> fixed endstop reached
S5TIME Monitoring time value –> test brake
BOOL Request, close brake
BOOL Request, initiate traversing motion
BOOL Test successfully completed
BOOL Fault/error has occurred
BYTE Fault status
Comment
Meaning
© Siemens AG, 2006. All rights reserved
03.06