MODBUS R
TU
Functions
and Addressing
Modes
Installation and
Safety Guidelines
3–3
MODBUS RTU Functions and Addressing Modes
DirectLogic Addressing Mode
The DirectLogic Addressing mode is set by placing Dip Switch 7 in the ON position. The
following memory locations are supported by the T1K–MODBUS base controller in the
DirectLogic Addressing Mode.
•
X0 – X1777 Discrete Inputs
•
Y0 – Y1777 Discrete Outputs
•
V0 – V177 Analog Inputs
•
V1400 – V1577 Analog Outputs
T1K–Modbus
Memory Type
QTY.
(Dec.)
PLC Range
(Octal)
V Memory Range
For Discrete Data Type
Inputs (X)
1024
X0 – X1777
V40400 – V40477
Outputs (Y)
1024
Y0 – Y1777
V40500 – V40577
For Word (16–bit) Data Types
Analog Input
Data Register (V)
128
V0 – V177
Analog Output
Data Registers (V)
128
V1400 – V1577
Using the
T1K–MODBUS with
a DirectLogic PLC
Modbus Master
