ptonsparky
Tom
- Occupation
- EC - retired
I've done small scale PLC for 40 years or so and this is the first time I've had an input fail. Voltage to it but no response. I've been using a two second delay to flag a coil failure, which is fine once up and running. I changed it to one second but feel I could make it even less.
PLC output to an interposing relay that then controls a starters 480v coil. Input back to the PLC via the starter's aux contacts. Any educated guesses as too how long that should take? IIRC program scan time is about 10 milli second. I'm not worried about contact bounce.
PLC output to an interposing relay that then controls a starters 480v coil. Input back to the PLC via the starter's aux contacts. Any educated guesses as too how long that should take? IIRC program scan time is about 10 milli second. I'm not worried about contact bounce.