Knx Points Definition; Modbus Interface; Modbus Points Definition - HMS Networks Intesis INKNXMBM1000200 User Manual

Modbus RTU Client to KNX TP Gateway
Code Name
Gateway path
0A
unavailable
Gateway target device
0B
failed to respond
Table 2. Gateway exception codes
Code Name Meaning
ER0 Unknown error The error type cannot be determined.
The cyclic redundancy check has detected an error in the response
ER1 CRC error
structure.
ER2 Reception length error The response length is not correct.
ER3 Reception time out No response after the timeout.

5.1.2. KNX Points Definition

The internal datapoints have the following KNX properties:
Property
If enabled, this signal will be active; if not, the behavior will be as if the point was not
Active defined. This allows you to deactivate points instead of deleting them, so that you can save
those points for future use.
# This is the number of the signal.
Object Name Descriptive information about the signal. You can edit these names.
This is the KNX data type used to code the signal's value, which depends on the type of signal
DPT
associated with the Modbus side.

5.2. Modbus Interface

This Intesis gateway acts as a client device in the Modbus RTU network. Other Modbus devices connected to the
same line and communicating with the Intesis gateway must always be server devices.
The Modbus protocol defines different types of function codes to read/write the registers of Modbus devices. It
also defines different data formats to encode values.
In the Modbus interface, you can configure the data encoding used for 16 bits registers (big-endian or little-
endian). This is the byte order for data encoding (MSB .. LSB or LSB .. MSB)
specifies this data encoding as big-endian, it varies depending on the manufacturer and/or the type of server.

5.2.1. Modbus Points Definition

Each signal point defined in the Intesis gateway has the following associated Modbus features:
Feature
# Server Modbus server address where the point belongs to.
One of the following Modbus data coding formats can be used:
• 1 - Read Coils
• 2 - Read Discrete Inputs
Function code
• 3 - Read Holding Registers
Read function
• 4 - Read Input Registers
• 5 - Write Single Coil
Write function
• 6 - Write Single Register
• 15 - Write Multiple Coils
• 16 - Write Multiple Registers
1
MBS: Most Significant Bit
LSB: Less Significant Bit
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The gateway could not allocate an internal communication path from the input to the output port for
processing the request. Example: The gateway is misconfigured or overloaded
The target device does not respond. Example: The target device is not present on the network.
Description
Description
Meaning
1
. Although the Modbus protocol
USER MANUAL Version 1.0
Modbus Interface