P3: Basic PLC Program for SINUMERIK 840D sl
13.13 Block descriptions
Basic Functions
990
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
The brake test is divided into the following steps:
Declaration of the function
Brake test sequence
Step
Expected feedback
Monitoring time value
Start brake test
DBX 71.0 = 1
TV_BTactiv
Close brake
Bclosed = 1
TV_Bclose
Output traversing command
DBX 64.6 Or DBX 64.7
TV_FeedCommand
Issue test travel command
DBX 62.5 = 1
TV_FXSreached
Wait for the holding time
DBX 62.5 = 1
TV_FXShold
Deselect brake test /
open brake
DBX 71.0 = 0
TV_BTactiv
Output test ok
Function_BLOCK FB 11
VAR_INPUT
Start
: BOOL ;
//Start of brake test
Ackn
: BOOL ;
//Acknowledge error
Bclosed
: BOOL ;
//Brake closed input (single channel - PLC)
Axis
: INT;
//Testing axis no.
TimerNo
: TIMER ;
//Timer from user
TV_BTactiv
: S5TIME ;
//TimeValue -> brake test active
TV_Bclose
: S5TIM;
//TimeValue -> close brake
TV_FeedCommand
: S5TIME ;
//TimeValue -> force FeedCommand
TV_FXSreached
: S5TIME ;
//TimeValue -> fixed stop reached
TV_FXShold
: S5TIME ;
//TimeValue -> test brake
END_VAR
VAR_OUTPUT
CloseBrake
: BOOL ;
//Signal close brake
MoveAxis
: BOOL ;
//Do move axis
Done
: BOOL ;
Error
: BOOL ;
State
: BYTE ;
//Error byte
END_VAR
