27
The NP Modbus TCP Card supports the following functions defined by the Modbus protocol:
Code
Function
Supported Port
Master
Slave
1
Read Coils
X
X
2
Read Discrete Inputs
X
X
3
Read Holding
Registers
X
X
4
Read Input Registers
X
X
5
Write Single Coil
X
6
Write Single Register
X
15
Force Multiple Coils
X
X
16
Preset Multiple
Register
X
X
ModBus Card Properties
Integer Error Detection
The Error Detection input is an Int Variable that is not used.
Integer Status
This status word provides additional information on errors and configuration status of the card. It has the
following meaning:
11 Invalid configuration
