3 Relay 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.
4 Relay 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
8 Proportional 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.
9 Proportional 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)
10 Proportional 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)
11 Proportional Control -- Definitions Direct Acting – the output increases as the input increasesReverse Acting – the output decreases as the input increases
21 Conventional 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
22 SZ-QD Trainer Demo Panel (SZ1031) 248 always works!!!Use down arrow to get to 248 more quickly.
23 SZ-QD Trainer Demo Panel (SZ1031) -- continued Use yourbadge numberas the addressfor your stat.
46 PC 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 ***
47 Superstat™ – conventional heat/cool… Rev Pro Manual pg C-9
48 Superstat™ – conventional heat/cool… Rev Pro Manual pg C-9
49 Superstat™ – conventional heat/cool… Rev Pro Manual pg C-9
50 PC 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 ***
57 Internet 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)