Siemens SINUMERIK 840D sl Function Manual page 1441

The brake test is divided into the following steps:
Brake test sequence
Step
Start brake test
Close brake
Output traversing command
Issue test travel command
Wait for the holding time
Deselect brake test/
open brake
Output test ok
Declaration of the function
Function_BLOCK FB 11
VAR_INPUT
END_VAR
VAR_OUTPUT
END_VAR
Description of formal parameters
The following table lists all of the formal parameters of the brake test function
Formal parameters of brake test function
Signal
Start
Ack
Basic logic functions: PLC basic program solution line (P3 sl)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Start : BOOL ;
Ack : BOOL ;
Bclosed : BOOL ;
Axis : INT ;
TimerNo : TIMER ;
TV_BTactiv : S5TIME ;
TV_Bclose : S5TIM;
TV_FeedCommand : S5TIME ;
TV_FXSreached : S5TIME ;
TV_FXShold : S5TIME ;
CloseBrake : BOOL ;
MoveAxis : BOOL ;
Done : BOOL ;
Error : BOOL ;
State : BYTE ;
Type
I
I
Expected feedback
DBX 71.0 = 1
Bclosed = 1
DBX 64.6 Or DBX 64.7
DBX62.5 = 1
DBX62.5 = 1
DBX71.0 = 0
//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 Remark
BOOL Starts the brake test
BOOL Acknowledge fault
Detailed description
2.12 Block descriptions
Monitoring time value
TV_BTactiv
TV_Bclose
TV_FeedCommand
TV_FXSreached
TV_FXShold
TV_BTactiv
167