Honeywell EXCEL 5000 User Manual

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Honeywell EXCEL 5000 User Manual Manual pdf 111 page image

EXCEL CARE CONTROL ICONS ALPHABETIC REFERENCE113 74-5577–33 (US)EN2B-0184 GE51 R0518 (Europe)(Shutdown) XFM 35 determines when immediate shutdown is necessary (see GeneralFunctions in the XFM 35 section) and sets user address ID___Shutdown to 1 tocommand all XFM 36-1/S/Rs to immediately shed their loads.When an XFM 36-1/S/R reads a 1 value in ID___Shutdown, it switches off its load,regardless of minimum ON time.After the shutdown command is over (ID___Shutdown = 0), each XFM 36-1/S/Rmust again receive a positive power value at its Po input before its load is turnedON.Start-up after a Power Failure Start-up action after a power failure depends on the type of algorithm in use.If the Sliding Window algorithm is being used (as described in the XFM 35section), power calculation continues after the power returns as if there were nointerruption. XFM 35 starts to switch ON the loads again as if the power demandprogram was starting for the first time.If using the Ideal Curve or Extrapolation algorithms (described in the XFM 35section), the power calculations are reset and restarted as if the whole system hasits first start-up. After the power returns, XFM 36-1/S/R receives a shutdownmessage from XFM 35 (ID___Shutdown = 1) and immediately switches off theload (see General Functions in the XFM 35 section). After the shutdown commandis over (ID___Shutdown = 0), each XFM 36-1/S/R must again receive a positivepower value at its Po input before its load is turned on.XFM 36-1 Priority Group AssignmentA maximum of 50 XFM 36-1s, 36-1Ss and 36-1Rs can connect to one another in agroup. XFM 36-1s, 36-1Ss and 36-1Rs connect to one another via the Po inputs andoutputs. In other words, the Po output of one XFM 36-1/S/R is the input to anotherXFM 36-1/S/R.You assign a group of XFM 36-1/S/Rs to a priority group by selecting XFM 35 inputPo1, Po2, or Po3 as the recipient of the Po output from the last (lowest loadnumber) XFM 36-1 in the group and the corresponding XFM 35 Po output as theinput to the Po of the first (highest load number) XFM 36-1 of the group. Forexample, if you select the Po2 input and output of the XFM 35, the group becomesPriority Group 2.XFM 36-1/S/R Switching BehaviorThe Po corrections carry the power values that each XFM 36-1/S/R uses tochange the status of its load (ON or OFF). A positive power value switches on(restores) the load; a negative value switches it off (sheds it).Several conditions in addition to the Po value (the first input) determine the finalcommand (ON/OFF) to the load output St. The command is sent to the first outputSt of XFM 36-1/S/R. These conditions are explained in the following sections,including the General Functions section.XFM 36-1/S Sequential Load SwitchingIn the sequential mode, each load in a priority group has a fixed rank. Low-rankingloads are shed first while high-ranking loads are shed last. Load 1 is the highestranking load and is shed last and restored first. The highest load number is thelowest rank. It is shed first and restored last.The following drawing shows how a group of seven loads responds to restore andshed commands.