This keyword specifies the maximum run time for the job, in seconds. If the RUN_TIME is greater than zero, the job will exit cleanly before the specified time has elapsed, leaving as little unused time as possible.
Clean termination before RUN_TIME cannot be guaranteed. The shortest operation which can be timed is an electronic minimization or a single molecular dynamics or geometry optimization step.
If RUN_TIME is less than or equal to zero, no time limit will be imposed on the run.
RUN_TIME : 360
CASTEP keyword glossary
CASTEP parameters keywords