cryoman
Member
I have been looking for a PLC that will perform several basic operations listed below. There is no shortage of units that have a lot more digital outputs and inputs, on them then I really need.
Specs:
2 analog inputs 4-20ma
2 analog output 4-20ma
8 digital inputs (120 vac)
8 digital outputs (120 vac)
Explanation:
I have a cryogenic processor that takes metal down to -300 F at about 1 degree every 2 minutes and back up to +300 at the same rate. Right now I am using a Watlow controller (installed at the factory) and it has very limited controls. The unit over ramps and short cycles between heat and cold which waste Liquid Nitrogen and is very costly.
I do have access to a Modicon compact 984 but the cards are very expensive and the software program is expensive.
dave
Specs:
2 analog inputs 4-20ma
2 analog output 4-20ma
8 digital inputs (120 vac)
8 digital outputs (120 vac)
Explanation:
I have a cryogenic processor that takes metal down to -300 F at about 1 degree every 2 minutes and back up to +300 at the same rate. Right now I am using a Watlow controller (installed at the factory) and it has very limited controls. The unit over ramps and short cycles between heat and cold which waste Liquid Nitrogen and is very costly.
I do have access to a Modicon compact 984 but the cards are very expensive and the software program is expensive.
dave
