The serial card supports the input and/or output of

16 different data sets per serial port, for a total of 32 data sets

per Serial Interface.

Serial dataset registers can be referenced directly in control

modules as analog or discrete I/O providing fast easy data

exchange with the serial device. Direct module-to-Dataset/

register references are recommended for control signals.

Alternatively, users can read multiple registers form a

Dataset into a single “marshalling” module at the cost of

a single DST. Marshalling modules provide a cost effective

way to integrate serial data from analyzers and other data

sources. Serial dataset registers can also be passed as

SCADA values directly to Workstations and Continuous

Historians without consuming DST’s.

Both Modbus RTU and Modbus ASCII communications

modes are supported by standard Modbus protocol.