3Relay Control -- Introduction Two-position control, using a digital (relay) output, is used to turn something on and off. We use a differential and an offset to tell an output when to open and close based on the control variable and setpoint.
4Relay Control -- Definitions Differential – amount of change in the control variable from when the output turns on to when it turns offOffset – a value that creates a deadband for a stage – the first stage typically has an offset of 0
8Proportional Control -- Introduction Analog outputs are called modulating outputs. These outputs vary based on how far the input is away from setpoint. Modulating outputs provide tighter control than two position outputs.
9Proportional Control -- Definitions Proportional Control – generates an output that is related to the distance between the active setpoint and the inputProportional Band/Throttling Range – number of degrees (or percent of span) that the input must change to drive the output from 0 to 100% (either 0 to 20 mA or 4 to 20 mA)
10Proportional Control -- Definitions Setpoint Offset – a value that creates a deadband before modulation startsAquastat – allows the action to reverse when a digital input is made (SZ1017a, SZ1018, SZ1143b, SZ1051) or an analog input exceeds a certain value (SZ1025a, SZ1018, SZ1062, SZ1064)
11Proportional Control -- Definitions Direct Acting – the output increases as the input increasesReverse Acting – the output decreases as the input increases
21Conventional Thermostats Menu-by-Menu ExampleFollow Along Using Demo PanelSlides Printed in HandoutCatalog Page 183All Thermostats Basically the SameComplete Sequences in Product ManualsAll Sequences in Product Catalog
22SZ-QD Trainer Demo Panel (SZ1031) 248 always works!!!Use down arrow to get to 248 more quickly.
23SZ-QD Trainer Demo Panel (SZ1031) -- continued Use yourbadge numberas the addressfor your stat.
46PC Based Software -- Revelation Professional Menu Driven ProgrammingUse for Network Setup & Testing, Commissioning, & Load Balancing“Read” Before Making Changes“Write” Before Going to NEXT Menu“Write” vs. “Write Half / Write Page”“Load All” & “Save All” Options*** NOT SUPPORTED AS OF JAN 2009 ***
47Superstat™ – conventional heat/cool… Rev Pro Manual pg C-9
48Superstat™ – conventional heat/cool… Rev Pro Manual pg C-9
49Superstat™ – conventional heat/cool… Rev Pro Manual pg C-9
50PC Based Software -- Insight Similar to Revelation Professional…Tab Driven InterfaceUses Same Datasheets as UbiquityUse for Network Setup & Testing, Commissioning, & Load BalancingShows Current Values (no “read” required)“Write Page” Before Going to New Tab*** NEW SOLUTION AS OF JAN 2009 ***
57Internet Style Software – Ubiquity Similar to Revelation Professional…Single Page for All Programming InfoShows Current Values (no “read” required)Writes All Values on “Submit”“Read Controller” Option (if needed)