| Basic
RDIO Operations |
Function
The RDIO series products add digital capability to your PLC
/ SCADA. Models are available that offer
upto 32 digital inputs and upto 32 digital outputs to the PLC / SCADA. The configuration
is done using the setup software.
The digital inputs and outputs are isolated from the host device.
RDIO has two communication ports. One port is used to connect
to the PLC and second port can be used to connect an
Operator Interface such as one of the Prizm series products or
an IBM PC to configure the RDIO. The communication between the RDIO and PLC is optimized for speed to allow fast
data transfer.
PLC Communication
The setup software defines the block of PLC registers used
for communication. Register words are used
for tracking inputs and outputs. Data is either
sent to the specified register in the PLC
or received from the register designated as Output register.
The
unit scans PLC registers continuously and evaluates the outputs.
RTU Mode
The RDIO can also be configured as Modbus RTU useful for
data acquisition. The Modbus protocol allows the user to use
off the shelf SCADA software such as ASTRA and other host
devices. The unit offers RS232 as well as RS485 hardware layers.
Digital I/Os
The I/Os are isolated and in case of outputs separate ground
can be made available for each output. The Unit has LED
indication for each I/O.
The unit is configured
using the Windows based setup software. This
will define the desired parameters for the unit like
the inputs and outputs to be used, PLC registers, etc. |
|
