Point with support to report a "real-time" current value. By real-time we typically mean freshness within the order of of a few seconds or at most a few minutes. For systems with direct I/O the current value is typically driven by the I/O scan rate. For overlay systems which acquire data over a protocol such as BACnet or Modbus then the current value is typically refreshed using polling or subscription over a network.
marker |
Marker labels a dict with typing information |
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curErr |
Error description when curStatus indicates error condition |
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curStatus |
Status of point's current value reading |
curVal |
Current value of a point |