Siemens SINUMERIK 840Di Function Manual page 1342

Detailed Description
2.12 Block descriptions
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
Bclosed
Axis
TimerNo
TV_BTactiv
TV_Bclose
TV_FeedCommand I
TV_FXSreched
TV_FXShold
CloseBrake
MoveAxis
Done
Error
State
Error identifiers
Error identifiers
State
0
1
2
3
4
5
6
7
8
9
2-148
Type Type
I BOOL
I BOOL
I BOOL
I INT
I TIMER
I S5TIME
I S5TIME
S5TIME
I S5TIME
I S5TIME
Q BOOL
Q BOOL
Q BOOL
Q BOOL
Q BYTE
Meaning
No fault
Start conditions not fulfilled, e.g., axis not under closed-loop control/brake closed/axis
disabled
No NC checkback in "Brake test active" signal on selection of brake test
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 (end position is reached)/approach velocity too high
Brake opens during the holding period
Error in brake test deselection
Remarks
Start brake test
Acknowledge error
Checkback input whether Close Brake is activated
(single-channel - 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 -> issue travel command Check
travel command after MoveAxis has been set.
Monitoring time value -> fixed stop reached
Monitoring time value -> test brake
Request for close brake
Request to initiate travel movement
Test successfully completed
Error occurred.
ErrorStatus
PLC Basic Program Solution Line (P3 sl)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0