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4.5.6.Map Descriptor Example 2. - Use unsolicited messages from the Panel to determine point status
ThisMapDescriptorcanbeusedtostorepointstat |
| usdatawhentheFieldServerreceivesanunsolicite | dmessagefromthePanel | ||||||||
containingpointstatusinformation(Xpointmessage | s).ThepanelsendsanXpointmessageeachtimea | point’sstatuschangesto | |||||||||
anynonnormalstate.UsingtheseMapDescriptors |
| willensurethattheFieldServerisconstantlyupda |
| tedwiththelatestpanelstatus | |||||||
information.TheMapDescriptor’sarepassivesot |
| heycanbeusedinajointstrategywiththeclist |
| function(section4.4.1)tokeep | |||||||
trackofapoint’sstatus.NotesinAppendixApro | videmoreinformation |
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OneXpointMapDescriptorisrequiredforstorageo |
| fXpointmessagesfromeachcard.Foragivencard |
| ,thedriverusesamapping | |||||||
functionbasedonthepointsubpointaddresstodet |
| erminethearraylocationtostorethestateforth | ecps. |
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Map_Descriptor_Name, | Data_Array_Name, | Data_Array_Offset, | Function, | Node_Name, | sim4100_func, | sim4100_card, | sim4100_point, | sim4100_sub, | Length | ||
A1 | DA_AI3, | 0 |
| passive, | Node_A, | xpoint, | 1, | 0, |
| 10, | 1000 |
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TheData |
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| SimplexDevice:Card | WhenusedwithanXpointMapDescthisparameter |
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extractedfromthe |
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| Allpointsubpointdata |
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| Driverstores | means‘Howmanysubpointsperpoint?’ |
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deviceisplacedin |
| forthiscardarestored |
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Mustbepassive | datafrom | Ifthevalueis10thenthedriveruses10arraylo | cations | |||
thisdriver | usingthisMapDesc. | |||||
| unsolicited | foreachpoint.Thus |
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independentdata |
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| xpoint |
| Point0:Arraylocations09 |
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array. |
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| messages |
| Point1:Arraylocation1019 |
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| Setthistozeroforxpoint |
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| Point2:Arraylocations2029… |
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| MapDesc. |
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| ThusforthisMapDesc.IftheXpointmessageisfor | 110 | |
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| thenthestatewillbestoredatlocation10. |
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| .IftheXpointmessageisfor125thenthestate | willbe | |
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| storedatlocation25. |
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Tel:(408)2622299 | Fax:(408)2622296 | Toll_Free:8885091970 | email:support@fieldserver.com | |
