Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
The shortest timestep allowed in EnergyPlus is 1 minute, see Field: Number of Timesteps per Hour.
Although there may be legitimate use cases for it, it's highly unusual to want such short timesteps. Perhaps you should ask a question around what you're trying to achieve, you may be misunderstanding what EnergyPlus will produce if run w/ a very short timestep.
