The Prev Value function block is used to determine the change from the previous DDC cycle.
Figure 1: PrevValue Function Block |
Figure 2: PrevValue Property Sheet |
Input
Description |
|
In |
This is 32-bit floating point input slot. |
Table 1: Input of PrevValue Function
Outputs
Description |
|
Out |
In |
Out Previous |
Value from previous DDC cycle from In. |
Out Deviation |
Value from deviated DDC cycle from In. |
Table 2: Outputs of PrevValue Function
Outputs
Description |
|
Out Save |
Master Sync Enabled : If you set it to "true" the last output will be set as output for one cycle after the controller restarts. The application can use it to return to the same state before the controller restart. Out: To enable or disable the Out feature. Out Previous:To enable or disable the Out Previous feature. Out Deviation:To enable or disable the Out Deviation feature. |
Table 3: Parameters of PrevValue Function
Examples
If any change in In, the Out Previous is set to the previous input value and Out deviation is set to "true".
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Figure 3:PrevValue Function Block
Refer to General Description for general information about IRMN4 Function Blocks.