Thermocouple - PLC Programming & Automation

Injection Molding Cycle, Barrel Zones and Guard Interlocks

Timing chart of one 22.5 s molding cycle: clamp locked from 1.5 s to 18.2 s, injection from 2 s to 3.2 s, hold pressure from 3.2 s to 6.2 s, cooling timer from 6.2 s to 18.2 s with screw rotation from 6.2 s to 12.7 s, mold open position reached at 20.2 s, ejector forward from 20.4 s to 21.4 s, mold closing again at 22.5 s and locked at 24 s

Injection molding from the controls side: the cycle as a state machine, barrel zone PID and thermocouple checks, EUROMAP 67 and 77, guards, and rubber.

Fuzzy Logic PLC Control: Rule Tables, Inference in ST and a Dryer Example

by PLC

Ladder rung with Dryer_Run examined on, Burner_Fault examined off and HMI_Fuzzy_Sel examined on in series, driving the Fuzzy_Active output coil

Where fuzzy control beats PID, how to hand-code memberships, a 3×3 rule table and weighted-average defuzzification in Logix ST, with a dryer example.