VI_ATTR_ASRL_DCD_STATE
Resource Classes
Serial INSTR
Attribute Information
| Access Privilege | Data Type | Range | Default |
|---|---|---|---|
|
Read/Write |
ViInt16 |
VI_STATE_ASSERTED (1) |
N/A |
Description
VI_ATTR_ASRL_DCD_STATE represents the current state of the Data Carrier Detect (DCD) input signal. The DCD signal is often used by modems to indicate the detection of a carrier (remote modem) on the telephone line. The DCD signal is also known as Receive Line Signal Detect (RLSD). This attribute is Read Only except when the VI_ATTR_ASRL_WIRE_MODE attribute is set to VI_ASRL_WIRE_232_DCE, or VI_ASRL_WIRE_232_AUTO with the hardware currently in the DCE state.
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