Siemens SINUMERIK 828D Function Manual page 991

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
TV_FXSreched
TV_FXShold
CloseBrake
MoveAxis
Done
Error
State
Fault IDs
State Significance
0 No error
1 Start conditions not fulfilled, e.g. the axis is not in closed-loop control / brake closed / axis
inhibited
2 No NC checkback in "Brake test active" signal on selection of brake test
3 No "Brake applied" checkback by input signal Bclosed
4 No travel command output (e.g., axis motion has not been started)
5 Fixed end stop will not be reached → axis RESET was initiated.
6 Traversing inhibit/Approach too slow → fixed stop cannot be reached. TV FXSreached
monitoring timeout
7 Brake is not holding at all (the end position is reached)/approach speed is too high
8 Brake opens during the holding time
9 Error when deselecting the brake test
10 Internal error
11 "PLC-controlled axis" signal not enabled in the user program
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Type Type Remark
I BOOL Starts the brake test
I BOOL Acknowledge fault
I BOOL Checkback input whether Close Brake is activated
(single­channel - PLC)
I INT Axis number of axis to be tested
I TIMER Timer from user program
I S5TIME Monitoring time value → brake test active, checking
of axis signal DBX 71.0
I S5TIME Monitoring time value → close brake Check of input
signal Bclosed after output CloseBrake has been set.
I S5TIME Monitoring time value → Travel command given
Check travel command after MoveAxis has been set
I S5TIME Monitoring time value → fixed stop reached
I S5TIME Monitoring time value → test brake
A BOOL Request, close brake
A BOOL Request, initiate traversing motion
A BOOL Test successfully completed
A BOOL Error has occurred
A BYTE Error status
P3: Basic PLC Program for SINUMERIK 840D sl
13.13 Block descriptions
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