There are four different run time limits for various portions of Eddie. These are currently set to 30 minutes, 6 hours, 24 hours, 48 hours. You should get into the habit of specifying your required run time when you submit your job. At the command line, this is done with the -l h_rt=h:m:s (where h:m:s is the required run time in hours:minutes:seconds).
Without specifying this, jobs will go into the first available slot, no matter what the maximum runtime is on that slot. This means that your job could be subject to a 30 minute maximum runtime, unless you specify otherwise.