This guide will tell you on how to remove your PCU limit in your Space Engineers server.
Please follow the steps below:
• Stop your server.
• Select "File Manager".
• Navigate to: Content folder, then CustomerWorlds, "If you can't find it, use the search bar and paste Sandbox_Config.sbc"
• Open Sandbox_Config.sbc by right-clicking and then clicking edit.
• Find "<BlockLimitsEnabled>GLOBALLY</BlockLimitsEnabled>".
• Replace GLOBALLY with NONE and then press the save and exit button.
• Navigate back to your control panel and start your server.
Here is an attached image: