8 |
3 |
SET UP MODE |
3.1Introduction
To access the Set Up Mode (Levels 2, 3 and 4) the correct password must be entered in the security code frame (the default password code is 0). Refer to the fold-out sheet at the back of this manual for the contents of these levels.
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LEV2 |
LEV1 |
tUnE |
Correct Password |
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OPEr |
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CodE |
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0 |
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LEV3
SEtP
Refer to the fold-out sheet for the contents of each level
3.2 |
Tuning (Level 2) |
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LEV2 |
Level 2 – Tuning Level |
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tUnE |
Note. To select this frame from anywhere in |
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this page, press the |
key for a few seconds. |
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Cycle Time |
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•1 |
cYc.1 |
Heat Time Proportioning Output |
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5.0 |
[1.0 to 300.0 seconds (<1.0 = 'On/Off' control)] |
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•2 |
cYc.2 |
Cool Time Proportioning Output |
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5.0 |
[1.0 to 300.0 seconds (<1.0 = 'On/Off control)] |
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HYSt |
Continued on next page. |
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0.1 |
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•1 Only displayed if output 1 is assigned to a relay or logic output. •2 Only displayed if heat/cool hardware configuration is selected.
2-20
…3 SET UP MODE
…3.2 Tuning (Level 2) – Fig. 3.2
8 |
•1 HYSt
0.1
On/Off Hysteresis Value
(used for both heat and cool outputs)
[In engineering units]
PV |
Set Point |
Hysteresis Value |
ON |
Reverse Acting |
OFF |
Control Output |
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Pb-H 
100.0 
Proportional Band
Enter the proportional band value for the heat and cool outputs.
Heat Output (Output 1)
[0.1% to 999.9%]
•2 Pb-c
100.0 
Intr |
30 |
Cool Output (Output 2)
[0.1% to 999.9%]
Continued on next page.
•1 Only displayed if On/Off control is selected for either output. •2 Only displayed if heat/cool hardware configuration is selected.
2-21
8 |
…3 |
SET UP MODE |
…3.2 Tuning (Level 2)
Intr |
Integral Action Time |
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[1 to 7200 seconds or OFF (OFF=0)] |
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30 |
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rSEt |
Manual Reset Value |
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[0% to 100% or –100% to +100% for heat/cool] |
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50 |
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This value is applied as a bias to the control output. |
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Note. Manual reset is applied with integral |
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action both on and off. |
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dr1U |
Derivative Action Time |
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[0.1 to 999.9 seconds or OFF (OFF=0)] |
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1.0 |
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•1 0.LAP 
0.0 
Overlap for Heat/Cool Control
[–20.0% to +20.0%]
This frame defines the portion of the proportional band (Proportional band heat + Proportional band cool) over which both outputs are active – see Fig. 3.1. Neither output is active in the deadband.
A positive value gives an overlap and a negative value a deadband.
•1 Only displayed if a heat/cool hardware configuration is selected.
2-22
3 |
SET UP MODE… |
8 |
a) Overlap |
Pb-h |
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Proportional Band (Heat) |
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(%) |
Output 1 |
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Pb-c |
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Power |
Proportional Band (Cool) |
Output 2 (cool) |
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(heat) |
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Output |
Output 2 |
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Output 1 (heat) |
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(cool) |
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OLAP |
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Process Variable |
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Overlap (positive value) |
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b) Deadband |
Pb-h |
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Pb-c |
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(%) |
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Proportional Band Heat |
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Proportional Band Cool |
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Output Power |
Output 1 |
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Output 2 |
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Output 2 |
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Output 1 |
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OLAP |
Process Variable |
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Deadband (negative value) |
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c) Output 2 on/off control |
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(%) |
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Pb-h |
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Output 1 |
Proportional Band Heat |
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Output 2 |
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Output Power |
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Output 2 |
O/P2 OFF |
O/P2 ON |
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Output 1 |
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HYSt |
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Process Variable |
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ON/OFF' Hysteresis (0% overlap) |
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Positive values |
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Negative values |
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OLAP |
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Overlap/Deadband |
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Fig. 3.1 Proportional Band & Deadband/Overlap – Heat/Cool Control Only |
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2-23 |
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