From Steven Beaumont at Faraday:
The approach that I would probably use in your case would be to
1:- Monitor a M or P variable from a PLC
2:- Change specific bits of the M or P variable from your ‘C’ program
3:- When your PLC sees the bit pattern change it would act upon it through an IF THEN statement then reset the bit pattern
Which approach is the quickest I couldn’t tell you without running a simulation
From Steven Beaumont at Faraday:
The approach that I would probably use in your case would be to
1:- Monitor a M or P variable from a PLC
2:- Change specific bits of the M or P variable from your ‘C’ program
3:- When your PLC sees the bit pattern change it would act upon it through an IF THEN statement then reset the bit pattern
Which approach is the quickest I couldn’t tell you without running a simulation