PathFinder Software Configuration Guide - Trilogy Communications

15.4.6 Panel Logic OutputsPathFinder Version 4.22 User GuideTwo logic outputs are provided on each standard 2RU panel. These outputs areprogrammed identically to the system logic outputs via the Logics / Outputs field. Pleaserefer to chapter Error! Reference source not found. for an explanation of programmingsystem logic outputs.15.4.7 Logics – Additional Information15.4.7.1 Normally Open and Normally Closed TerminologyThe nomenclature “Normally Open” and “Normally Closed” is derived by analogy to relaycontacts.If a logic output is normally open, the output “contact” is off. To activate the output, the keydriving the logic output must be pressed on.If a logic output is normally closed, the output “contact” is on. To deactivate the output, thekey driving the logic output must be pressed on.If a logic input is normally open, it behaves as if a “contact” driving the input has not beenclosed – the inhibit list and/or other function associated with the input is not activated bydefault. The physical input must be driven on to implement the associated function.If a logic input is normally closed, it behaves as if a “contact” driving the input has beenclosed – the inhibit list and/or other function associated with the input is activated by default.The physical input must be driven on to undo the associated function.15.4.7.2 Special use of Logic Inputs and Outputs on GPIO CardsEach GPIO card has 40 logic inputs and 64 logic outputs. These are split between “real”physical inputs (of which there are 28) and outputs (of which there are 24), and specialinputs and outputs. The functions of these are tabulated below.Logic Input/OutputNumberLogic Input SpecialFunctionLogic Output SpecialFunction1-10 none none11-14 none Access by FPGA15-24 Access by FPGA Access by FPGA25 Access by FPGA Fires Tone Blip 126 Access by FPGA Fires Tone Blip 227 Access by FPGA Fires Tone Blip 328 Access by FPGA Not Used29-40 loop-back from output 29-40 Internal loop-back to driveinputs 29-4041-64 Do not exist Internal loop-back to driveinputs 1-28. Logic ORs withphysical inputs 1-28Notes“Access by FPGA” The GPIO card has a Field Programmable Gate Array device that maybe custom configured by trilogy to provide more complex logic functions to special order.“Loopback” This facility always features normally driven by logic inputs to beactivated by a logic input. For example an inhibit list may be triggered by a logic output.“Fires Tone Blip” Each GPIO card has 3 sampled sound files of 0.45 second duration.These may be started by the appropriate logic output.“Logic OR” This allows either the physical logic input or the looped-back logicoutput to activate the logic input function.Page 96 of 96 Issue 1 Trilogy Communications Limited