---
title: Protocols & Formats
slug: concepts/protocols-and-formats
docTags: 
createdAt: 2025-09-01T12:22:00.382Z
---

Collectors talk to equipment and other systems over industrial protocols. This section covers the protocols Factry Historian supports, and the payload formats it reads and writes.

1. [OPC-UA](docId\:T4C6lBhu8wsXKbLvER-BE)
2. [OPC-DA](docId\:QdJvhY8CkywH148rD9cJy)
3. [MQTT](docId\:Gda3rkPD1UuGjQcsXD5v5)
4. [SQL](docId\:INioyw6PHvawP5aEjMyXX)
5. [REST API](docId\:OiCQDiLgXTuqiP_mvb5a6)
6. [Modbus TCP](docId:-40jggXcnAK-wAnTsu_Bq)
7. [Siemens S7](docId\:U9_EPynT6xJEGDAzvTwV4)