Siemens SINUMERIK 840D Description Of Functions page 453

11.03
END_VAR
VAR_OUTPUT
END_VAR
The following table lists all of the formal parameters of the brake test function
Signal Type Type
Start I
Quit I
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
Error IDs
State
0
1
2
3
4
5
6
7
8
9
10
11
© Siemens AG 2003 All Rights Reserved
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
8.3 Testing the function of the brake mechanical system
TV_Bclose : S5TIME ; //TimeValue -> close brake
TV_FeedCommand : S5TIME ; //TimeValue -> force FeedCommand
TV_FXSreached : S5TIME ; //TimeValue -> Fixed stop reached
TV_FXShold : S5TIME ;
CloseBrake : BOOL ; //Signal close brake
MoveAxis : BOOL ; //do move axis
Done : BOOL ;
Error : BOOL ;
State : BYTE ; //Error byte
Remarks
BOOL Starts the brake test
BOOL Acknowledgement error
BOOL Checkback input whether close brake is controlled (single-
channel - PLC)
INT Axis number of axis to be tested
TIMER Timer from user program
S5TIME Monitoring time value -> close brake. Test 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
travel command 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
BOOL Test successfully completed
BOOL Error has occurred
BYTE ErrorStatus
Meaning
No error
Start conditions not fulfilled, e.g. axis not in closed-loop control/brake
closed/axis inhibited
No NC checkback in the "brake test active" signal when the brake
test is selected
No checkback signal "brake applied" using the input signal Bclosed
No traversing command output (e.g. axis motion has not been
started)
Fixed endstop will not be reached - axis RESET was initiated.
Traversing inhibit/approach too slow -> fixed endstop cannot be
reached. Monitoring time TV_FXSreached has expired.
Brake is not holding at all (end position is reached)/approach speed
is too high
Brake opens during the holding period
Error when de-selecting the brake test
Internal error
"PLC-controlled axis" signal not enabled in the user program
8 Application examples
//TimeValue -> test brake
8-453