Implements a Set-Reset (SR) latch.
Inputs |
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Slots |
Type |
Default |
Description |
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Set |
Digital |
Null |
When the EdgeTrigger property is set to True, a False‑to‑True transition will cause the Output to latch to True (the Reset input must be either Null or False for the Set transition to take effect). When the EdgeTrigger property is set to False, the latch works according to the table shown below for EdgeTrigger. |
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Reset |
Digital |
Null |
When the EdgeTrigger property is set to True, a False‑to‑True transition will cause the Output to latch to False (the Set input must be False for the Reset to take effect). When the EdgeTrigger property is set to False, the latch works according to the table shown below for EdgeTrigger. |
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Outputs |
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Slots |
Type |
Description |
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Output |
Digital |
The latch output. |
Properties |
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Slots |
Description |
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Persistent |
Determines if the latched value is persisted across program restarts and power-cycles |
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DefaultValue
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Determines the initial value of the block on program start, or on initial load of the program. If the block is not persistent, the output will be set to the DefaultValue on the restart of the program (including controller restarts and power-cycles). If the block is persistent, the DefaultValue will only be used on the initial download and start of the program, and will not be used on subsequent restarts. |
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EdgeTrigger |
When set to True, the latch operates as an SR latch. When set to False, the latch operates according to the following table:
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