Field help (ABTTIMOUT) 

Makes it possible to specify a maximum time in minutes for the execution of the task. More than this time, the server will kill the task (if 0, there is no time-out).

Warning this duration is the minimum duration. The actual delay beyond which the task will be stopped also depends on the general parameters for the server : in fact, the task stop test is made at a regular interval in time that can be defined by the parameterization.