Free PLC Tools
Tools for Controls Engineers
Fast, browser-based utilities for commissioning and troubleshooting — no sign-up, and nothing ever leaves your machine. Built by automation engineers, free to use.
Analog Scaling Calculator
Convert raw card counts (4–20 mA, 0–10 V, ±10 V) to engineering units and back, then copy ready-to-paste scaling code for Rockwell, Siemens and CODESYS.
Open toolCommunicationModbus Register Calculator
Decode and encode registers across ABCD/CDAB/BADC/DCBA byte orders, and translate the 40001 data-model address to the 0-based protocol address with the right function codes.
Open toolElectricalWire & Cable Sizing Calculator
Size copper or aluminum conductors by NEC ampacity with temperature and bundle derating, then check voltage drop for single phase, three phase or DC runs.
Open toolNetworkingIP Subnet Calculator
Convert CIDR to subnet mask, find the network, broadcast and usable host range, and assign IP addresses to the PLCs, HMIs and drives on a line.
Open toolMore tools coming soon
A ladder logic simulator, timer/counter helpers, and a VFD parameter helper are on the way.