Description Of Fb11 - Siemens SINUMERIK 840D sl Function Manual

Connecting sensors and actuators
8.6 Safe Brake Test (SBT)
8.6.7

Description of FB11

Declaration of the function
VAR_INPUT
END_VAR
VAR_OUTPUT
END_VAR
The following table lists all of the formal parameters of the brake test function:
Start
Ackn
Bclosed
Axis
TimerNo
TV_Btactiv
TV_Bclose
300
Start : BOOL;
Ackn : BOOL;
Bclosed: BOOL;
Axis : INT ;
TimerNo : TIMER ;
TV_BTactiv : S5TIME ;
TV_Bclose : S5TIME ;
TV_FeedCommand : S5TIME ;
TV_FXSreached : S5TIME ;
TV_FX
Shold :
S5TIM
E ;
CloseBrake : BOOL;
MoveAxis : BOOL;
Done: BOOL;
Error : BOOL;
State : BYTE ;
Signal Input
or out‐
put
E
E
E
E
E
E
E
//Start of brake test
//Acknowledge error
//Brake closed input (single channel - PLC)
//Testing axis no.
//Timer from user
//TimeValue -> brake test active
//TimeValue -> close brake
//TimeValue -> force FeedCommand
//TimeValue -> fixed stop reached
//TimeValue -> test brake
//Signal close brake
//Do move axis
//Error byte
Type
BOOL Starts the brake test
BOOL Acknowledge fault
BOOL Feedback signal input as to whether the brake
has been closed (single-channel – PLC)
INT Number of the 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.
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Remark
Safety Integrated