Group logic into appropriate execution tasks (Fast, Medium, Slow). Critical safety logic and loops should run in the Fast task, while UI updates and history logging should run in the Slow task to prevent CPU overloading.
Using the PID output to drive a step-control block that turns compressors on or off.
Using CAREL downloading utilities (such as pCO Manager or directly through 1tool), the compiled application binary is uploaded to the physical controller via a USB-to-RS485 converter or an Ethernet cable. Final fine-tuning is performed live on the test bench. Tips for Optimizing Your 1tool Projects
1tool handles complex networking natively. Within the software interface, you can easily map variables to standard protocols including: Modbus RTU / Modbus TCP BACnet MS/TP / BACnet IP CAREL pLAN (proprietary local area network) LonWorks and Konnex (KNX) Workflow: Building an HVAC/R Project in 1tool carel 1tool software
Systems rarely work in isolation. This tool helps configure communication protocols (Modbus, BACnet, LonWorks, etc.) so the controller can talk to sensors, valves, and BMS systems.
CAREL 1tool is a comprehensive development environment used to create control software for CAREL programmable controllers. Unlike standard generic programming platforms, 1tool is tailor-made for HVAC/R applications. It bridges the gap between complex software engineering and thermodynamic system management.
: A central hub to define and manage all project variables, ensuring consistency between logic and the UI. Simulation & Debugging Group logic into appropriate execution tasks (Fast, Medium,
| | Primary Use Case | | :--- | :--- | | OEM Programmers | Writing complex application logic for chiller or rooftop unit controllers. | | Field Service Technicians | On-site diagnostics, parameter adjustments, and firmware updates. | | Facility Managers | Monitoring system performance and troubleshooting alarms via remote access. | | System Integrators | Commissioning multi-drop networks and verifying BACnet/Modbus mappings. |
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Optimized algorithms handle the high-inertia nature of HVAC systems, preventing compressor short-cycling and temperature overshoots. Using CAREL downloading utilities (such as pCO Manager
Create the menu structures and alarm screens for the user terminal.
Define data exchange parameters between master and slave controllers, sensors, and variable speed drives. 3. The 1tool Development Workflow
The software is engineered to program CAREL’s flagship hardware ranges, including: pCO High Efficiency (c.pCO series) pCO mini
CAREL offers specific certification courses for 1tool.
