Tag: plc

M-Duino external voltage reference trap

When wiring the Arduino based Programmable Logic Controller (PLC) from Industrial Shields, I have become stuck for a little bit due to trouble understanding how to enable the outputs. Currently using their Ethernet range based on Arduino Mega 2560. Its internals seem to be quite …

Unexpected naming conventions

In IEC 61131-3 compatible programming environments, string manipulation have many inbuilt functions. Unfortunately, sometimes the routines are a little bit hard to find. Even though it is possible to do a search through available functions, just searching by name sometimes won't …