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| Configuration |
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| Function Prompt | Selection or Range of Setting |
| Parameter | ||||
| Lower Display |
| Upper Display |
| Definition | |||
| English | Numeric |
| English | Numeric |
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| Code |
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| Code |
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| 50 |
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| CURRENT DUPLEX RANGE | ||
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| setting should be used for Relay/Current and | ||
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| Current/Relay Duplex Outputs. It can also be | ||
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| used for Current Duplex when an Auxiliary | ||
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| Output board is present. This enables the | ||
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| normal control current output to provide heat | ||
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| control and the auxiliary current output to | ||
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| provide cool control. To enable this: | ||
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| • AUX OUT in the Options Set Up group | ||
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| must be selected for Output. | |
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| • | The Auxiliary Current Output is scaled as | |
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| desired for | |
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| • | Deadband for this configuration only | |
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| applies to the Current Output. The | |
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| Auxiliary Output must have the Deadband | |
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| scaled in. | |
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| FOR EXAMPLE: | ||
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| If a 2 % Deadband is desired, then enter 2.0 | ||
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| for the Deadband selection in the Control | ||
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| Algorithm group. This will apply Deadband to | ||
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| the Current Output. In the Options group, set | ||
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| the Auxiliary Output LOW VAL selection to | ||
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| 49.0 and the HIGH VAL selection to 0.0. | ||
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| 100 |
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| CURRENT DUPLEX RANGE (FULL) | ||
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| enables the Current Output to provide both | ||
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| heat and cool functions for control over 0- | ||
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| 100 % of the controller output. The PID heat | ||
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| parameters apply when the output is greater | ||
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| than 50 % and the PID cool parameters | ||
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| apply when the output is less than 50 %. The | ||
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| second current output is not required for this | ||
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| type of duplex operation. | ||
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4/07 | UDC2500 Universal Digital Controller Product Manual | 53 |