7 - Bit Instructions - Fall 09

7 - Bit Instructions - Fall 09 - MFET 243, Automated...

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MFET 243, Automated Manufacturing I 10/5/2009 Bit Instructions 1 Bit Instructions Fall ’09 T.E. Kostek MFET 243 Automated Manufacturing I Topics Common Bit Instructions Common Bit Instructions: XIC, XIO, OTE, OTL, OTU Start/Stop Logic One Shot Instructions: 2 ONS, OSR, OSF Miscellaneous Programming Topics
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MFET 243, Automated Manufacturing I 10/5/2009 Bit Instructions 2 Common Bit Instructions Common Bit Instructions Topics Topics: XIC, Examine if Closed XIO, Examine if Open OTE, Output Energize OTL, Output Latch These instructions must be id b i t d d 4 OTU, Output Unlatch assigned a bit address, not a word address
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MFET 243, Automated Manufacturing I 10/5/2009 Bit Instructions 3 Common Bit Instructions Bit Instructions are covered in Chapter 1 of the Bit Instructions are covered in Chapter 1 of the manual entitled “Logix 5000 Controllers – General Instruction Set Reference Manual” 5 XIC, Examine if Closed Also called “Examine On” or “Normally Open Also called Examine On or Normally Open input instruction” XIC is an input instruction The XIC instruction is true when the bit it is 6 examining is set to a 1 , otherwise it is false.
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MFET 243, Automated Manufacturing I 10/5/2009 Bit Instructions 4 XIO, Examine if Open Also called “Examine Off” or “Normally Closed Also called Examine Off or Normally Closed input instruction” XIO is an input instruction The XIO instruction is true when the bit it is 7 examining is reset to a 0 , otherwise it is false. OTE, Output Energize Also called a “Coil” instruction Also called a Coil instruction OTE is an output instruction When the rung is true (has logical continuity) the OTE i t ti i bl d d ill t th bit 8 OTE instruction is enabled and will set the bit associated with the OTE instruction. The bit remains set until the rung becomes false.
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MFET 243, Automated Manufacturing I 10/5/2009 Bit Instructions 5 OTE, Output Energize The OTE instruction is non retentive The OTE instruction is non-retentive OTE instructions are generally reset (turned off) when: Switching the processor from the program mode back to the run mode 9 Power is restored after a power failure The OTE instruction acts like a relay coil OTL, Output Latch This is an retentive output instruction This is an Retentive will remain on after a power failure, it must be reset When the rung has logical continuity the OTL 10 When the rung has logical continuity the OTL instruction is enabled and will set the bit associated with the OTL instruction. The bit remains set until it is cleared with an OTU instruction.
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MFET 243, Automated Manufacturing I 10/5/2009 Bit Instructions 6 OTU, Output Unlatch This is an output instruction The OTU instruction is typically used to clear (reset) a bit which has been latched via an OTL instruction 11 Latch Instructions When the rung goes true The output turns on 12 When the rung goes false This output goes back off
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MFET 243, Automated Manufacturing I 10/5/2009
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This note was uploaded on 02/29/2012 for the course MFET 243 taught by Professor T.e.kostek during the Fall '09 term at Purdue University-West Lafayette.

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7 - Bit Instructions - Fall 09 - MFET 243, Automated...

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