In $machine.dat...
 
$BRK_MODE='B0101'
 
Command mode:
Bit 0 = 0            Robot brakes do not close at end of command.
Bit 0 = 1            Robot brakes close at end of command in accordance with mode bit 1.
Bit 1 = 0            Robot brakes all open and close simultaneously.
Bit 1 = 1            Robot brakes open and close individually during axis-specific motion.
Program mode:
Bit 2 = 0            Robot brakes do not close during motion pauses within programs.
Bit 2 = 1            Robot brakes always close simultaneously during motion pauses within programs.
External axes:
Bit 3 = 0            External axes respond in the same way as the robot brakes in accordance with mode bits 0 - 2.
Bit 3 = 1            Mathematically coupled external axes respond in the same way as the robot axes.
                     External axes that are not mathematically coupled function independently of the robot axes when they are controlled separately.


As of 2013.09.24, KR5 in NRK Lab is set to
$BRK_MODE='B1111'
and is SIMULATING a rail