Rockwell Automation 2711 MODBUS COMMUNICATIONS FOR PANELVIEW TERMINALS - Manual (Page 15)

Publication 2711-6.9
Modbus Communications for PanelView Terminals 15
Data and Address Types
Not all of the data types are compatible with every address type. The
following table shows the Address Type available based on the
selected data type.
Modicon Controller Data
Table Modicon controllers store read and write address spaces in the
following data table locations.
Note: The PanelView does not require data addresses that conform to
the address ranges provided in the following table. For each address
type, the PanelView terminal supports address ranges from 0 to 65535.
For example, for a discrete input status at address 40000, the full
address representation would be 140000.
Data Type Compatible Address Type(s)
Bit Input Status, Output Coil
4BCD All Address types
Unsigned Integer Input Register, Holding Register
Signed Integer Input Register, Holding Register
IEEE Float Input Register, Holding Register
Bit Array Input Status, Output Coil
Character Array Input Register, Holding Register
Address Address Type Data Access Description
0xxxxx Discrete Output
or Coil (Internal) Bit Read or Write Use to drive a real output through an output module or to
set one or more internal coils.
A coil can be used to drive multiple contacts.
1xxxxx Discrete
Input Status Bit Read Only Use to drive contacts in the logic program. The Input state
is controlled by an input module.
3xxxxx Input Register Word Read Only Holds numeric inputs from an external source (for
example, a thumb wheel entry, an analog signal or data
from a high speed counter). A 3x register can also store
16 contiguous discrete signals that are entered into the
register in either binary or binary coded decimal (BCD)
formats.
4xxxxx Output
Holding Register Word Read and
Write Use to store numerical (decimal or binary) information or
to send the information to an output module.
6xxxxx Extended
Memory Register Access through
Logic Program only Use to store information in an extended memory area.
Only available in PLCs with 24 bit CPUs that support
extended memory such as the 984B, E984–785 and
Quantum series of PLCs.