The H1 Carrier Multiple Discrete Output (FFMDO) function block takes an 8-bit setpoint and writes it to the I/O channels of a Discrete Output card on an H1 Carrier device. Each of the eight bits represents a binary setpoint for a single channel in the Discrete Output card. This block must be assigned to an H1 Carrier Device. The block is used to produce discrete output values for multiple devices through a Discrete Output card connected to an H1 carrier. Using the H1 Carrier Multiple Discrete Output block assigned to a carrier enables the DeltaV controller to communicate with multiple discrete devices through the H1 fieldbus rather than through conventional wiring.
The H1 Carrier Multiple Discrete Output function block supports mode control and simulation. There are no standard alarms in this function block.
Normally, the block is used in Cascade (Cas) mode so that a signal from another block changes the setpoint. Change to Automatic (Auto) mode to disconnect the other block and to set the setpoint locally.
CAS_IN_D is the remote setpoint value from another function block.
BKCAL_OUT_D is the output value and status required by the BKCAL_IN_D input of another block.
OUT_D is the 8-bit integer output value and status.
The following diagram shows the internal components of the H1 Carrier Multiple Discrete Output function block.
