ciplink

EtherNet/IP (CIP) client driver for Allen-Bradley Logix, Micro800 and SLC/MicroLogix PLCs: the Rust core of the ciplink Python package (a pycomm3 fork), also bound to C, C++ and C#.

use ciplink::logix::driver::{LogixDriver, LogixOptions};
use ciplink::Value;

fn main() -> ciplink::Result<()> {
    let plc = LogixDriver::new("192.0.2.100/1", LogixOptions::default())?;
    plc.open()?;
    for t in plc.read(&["Counter", "Recipe.Speed"])? {
        match (&t.value, &t.error) {
            (Some(value), None) => println!("{} = {value:?}", t.tag),
            (_, error) => println!("{}: {error:?}", t.tag),
        }
    }
    plc.write(&[("Setpoint", Value::Real(12.5))])?;
    plc.close()
}

• Explicit messaging over TCP 44818: unconnected and class 3 connected (Forward Open and Large Forward Open).
• Logix: tag list upload (or lazy lookups), reads and writes of any tag with request packing and fragmentation, symbol instance addressing, tag table change detection, a tag cache file, descriptions, PLC time.
• SLC 500 / MicroLogix data files through PCCC; generic CIP messages to any device.
• Blocking I/O on std threads; a driver can be shared between threads (one request at a time). Logs through log.
• A failure on one tag is data in that tag's result (TagResult::error, with an ErrorKind), not an Err for the whole call.

The ciplink-sim crate of the same repository serves a simulated controller for tests.