Programming

The logic is written in the languages a PLC programmer already knows. Ladder and FBD are two views of the same program — switch between them any time — and everything compiles into one bytecode that the panel executes. The device never parses text: uploading a program is uploading data, never firmware.

Ladder (LD) — rungs, contacts, coils and blocks with EN/ENO, the way an electrician reads them
Function block diagram (FBD) — the same logic as networks of blocks, plus composite blocks you build yourself
Structured Text (ST) — the textual language underneath, with the full block library callable from it