Because the software is developed by the same manufacturer as the hardware, I/O assignment, hardware limitations, and memory allocation are managed natively and seamlessly.
Connect your PC to the CAREL controller via a programming key or ethernet connection to watch variable values change in real-time within the Strategy Editor.
1Tool is the primary IDE (Integrated Development Environment) for Carel’s programmable controllers. It supports:
: Complex, consolidated algorithms based on secure logic for standard HVAC/R functions. carel 1tool software
Carel 1-Tool software!
Map data points exchanged between the main controller, electronic expansion valves (EEVs), variable frequency drives (VFDs), and building management systems (BMS). Architecture of a 1tool Project
(What You See Is What You Get) interface used to design the user interface for unit terminals. It supports multiple languages and display types (e.g., PGD1, PGD3) within a single project. Simulation Editor Because the software is developed by the same
The software is available for free download from Carel’s official website. It connects to controllers via USB, Ethernet, or serial interface (using Carel’s programming keys or gateways). While the software is free, some advanced features or protocol libraries may require a license key.
Furthermore, with the rise of (pCO5+), 1Tool now supports script writing in Python for advanced data manipulation before data is sent to the cloud.
Carel 1tool is the official, high-level development software suite designed specifically for programming, debugging, commissioning, and maintaining the CAREL (programmable controllers). It supports: : Complex, consolidated algorithms based on
Although new technologies like c.suite and STone represent the future, the practical reality of the industry ensures that 1Tool's reign is far from over. For system integrators, OEM engineers, and service technicians working with the vast installed base of CAREL controllers, mastering 1Tool is not just an option—it is an essential skill. It remains a powerful, efficient, and flexible tool that, for over a decade and a half, has successfully turned complex software coding challenges into manageable solutions for the HVAC/R world.
The software is engineered to streamline the development lifecycle of an HVAC/R control system through a series of specialized modules and features:
: A powerful debugging tool that allows developers to test the control algorithm and user interface simultaneously on a PC, reducing the need for physical hardware during early testing. Commissioning Tool (pCO Manager)