Siemens SINUMERIK 840D sl Function Manual page 1442

Detailed description
2.12 Block descriptions
Formal parameters of brake test function
Signal
Bclosed
Axis
TimerNo
TV_BTactiv
TV_Bclose
TV_FeedCommand I
TV_FXSreched
TV_FXShold
CloseBrake
MoveAxis
Done
Error
State
Fault IDs
State
0
1
2
3
4
5
6
7
8
9
10
11
Note
The block must be called by the user program. The user must provide an instance DB with
any number for this purpose. The call is multi-instance-capable.
168
Type Type
I BOOL
I INT
I TIMER
I S5TIME
I S5TIME
S5TIME
I S5TIME
I S5TIME
A BOOL
A BOOL
A BOOL
A BOOL
A BYTE
Significance
No error
Start conditions not fulfilled, e.g., the axis is not in closed-loop control/brake closed/axis
inhibited
When the brake test is selected, no NC feedback in the "brake test active" signal
No "Brake applied" checkback by input signal Bclosed
No travel command output (e.g., axis motion has not been started)
Fixed end stop will not be reached -> axis reset was initiated
Traversing inhibit/approach too slow -> fixed end stop cannot be reached. TV
FXSreached monitoring timeout
Brake is not holding at all (the end position is reached)/approach speed is too high
Brake opens during the holding time
Error when deselecting the brake test
Internal error
"PLC-controlled axis" signal not enabled in the user program
Remark
Checkback input whether Close Brake is activated
(singlechannel - PLC)
Axis number of axis to be tested
Timer from user program
Monitoring time value -> brake test active, check of axis
signal DBX71.0
Monitoring time value -> close brake Check of input
signal Bclosed after output CloseBrake has been set.
Monitoring time value -> Travel command given Check
travel command after MoveAxis has been set
Monitoring time value -> fixed stop reached
Monitoring time value -> test brake
Request, close brake
Request, initiate traversing motion
Test successfully completed
Error has occurred
Error status
Basic logic functions: PLC basic program solution line (P3 sl)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0