Hi all,
I've done an open source PLC hardware based on LDMicro :
http://faztech.free.fr/uploads/zplc/
Schematics and simple-face PCB routings are published, the target uP is 18 pins PICs (16F628 & 16F88)
All is fine, LDMicro simulator's behavior is quite consistant with real hardware and I'm really happy with the development suite (congratulations and many thanks to Jonathan Westhues).
Now, it seems I've seen a bug: the set-only coil behaves exactly like normal coil (it goes to zero when inputs go to zero, which it shouldn't), see the ladder code :
PROGRAM
RUNG
CONTACTS XRB0 0
COIL YRB1 0 1 0
END
Maybe I'm just mis-using the coil, can anyone confirm it's a bug, please ?