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GE System I/O . MAIN 222 Industrial Controllers. Introduction . See Unit 4 Course Manual Info %I is an input %Q is an output %M is an internal bit An internal bit is a contact or location that is memory / virtual in nature. Contacts.
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GE System I/O MAIN 222 Industrial Controllers
Introduction • See Unit 4 Course Manual Info • %I is an input • %Q is an output • %M is an internal bit • An internal bit is a contact or location that is memory / virtual in nature
Contacts • A contact is used to monitor the state of a machine or internal reference. • Whether or not the contact passes “flow” depends on status of the reference being monitored and type of contact. Normally Open = Reference is On 1 Normally Closed = Reference is Off 0
Contacts • Types of Coils • Unit 9-5 HO • Retentive • Non-retentive • Power Off then Back On Stays the Same That is Retentive • SET • RESET
Types Of Contacts • %Q • Discrete machine outputs • Non-Duplicated • %M • Internal Discrete References • Not Retentive • Can be Duplicated • %T • Temporary Internal References • Not Retentive • Can be Duplicated
Relay Elements • Unit 9-7 • Go over 9-8 Example
Addressing Systems • Siemens • E = In • A = Out • GE • I = In • Q=Out • TI • X = In • Y = Out
Where to Get More Information • See Web Site • VersaPro 2.02/3 users guide • Unit 2,4,9 from Series 90-30 Course Manual HO