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UNIT 22: PROGRAMMABLE LOGIC CONTROLLERS Unit …
www.freestudy.co.ukD.J.Dunn www.freestudy.co.uk 1 UNIT 22: PROGRAMMABLE LOGIC CONTROLLERS Unit code: A/601/1625 QCF level: 4 Credit value: 15 TUTORIAL – OUTCOME 2 Part 1 This work covers part of outcome 2 of the Edexcel standard module.
UNIT 22: PROGRAMMABLE LOGIC CONTROLLERS Unit …
www.freestudy.co.ukD.J.Dunn 6 5. STEP CONTROLLERS For a sequence like the one in the last section, the best form of PLC is a dedicated STEP controller. These have input and output terminals in the normal way.