KNX Modbus RTU Master USER MANUAL Issue date: 04/2020 r1.
IntesisTM KNX – Modbus Master User Manual r1.0 eng Important User Information Disclaimer The information in this document is for informational purposes only. Please inform HMS Industrial Networks of any inaccuracies or omissions found in this document. HMS Industrial Networks disclaims any responsibility or liability for any errors that may appear in this document. HMS Industrial Networks reserves the right to modify its products in line with its policy of continuous product development.
IntesisTM KNX – Modbus Master User Manual r1.0 eng Gateway for the integration of Modbus RTU installations into KNX TP-1 (EIB) enabled monitoring and control systems. ORDER CODE INKNXMBM1000100 © HMS Industrial Networks S.L.U - All rights reserved This information is subject to change without notice URL https://www.intesis.
IntesisTM KNX – Modbus Master User Manual r1.0 eng INDEX 1 Description ............................................................................................................................................... 5 Introduction ....................................................................................................................................... 5 Functionality ................................................................................................................................
IntesisTM KNX – Modbus Master User Manual r1.0 eng 1 Description Introduction This document describes the integration of Modbus RTU installations into KNX systems using the Intesis KNX– Modbus Master gateway. The aim of this integration is to make accessible Modbus system signals and resources from a KNX control system or device, as if it was a part of the own KNX TP-1 (EIB) system and vice-versa.
IntesisTM KNX – Modbus Master User Manual r1.0 eng Functionality From the Modbus system point of view, after the start up process, Intesis reads continuously the points configured to be read in the Modbus RTU Slave devices and updates in its memory all the values received from the Modbus system.
IntesisTM KNX – Modbus Master User Manual r1.0 eng 2 KNX System In this section, a common description for all Intesis KNX series gateways is given, from the point of view of KNX system which is called from now on internal system The Modbus system is also called from now on external system. Description Intesis gateway KNX connects directly to the KNX TP-1 (EIB) bus and behaves as one more device into the KNX system, with the same configuration and operational characteristics as other KNX device.
IntesisTM KNX – Modbus Master User Manual r1.0 eng Points definition Every internal datapoint to define has the following KNX properties: Property Object name DPT Active Description Descriptive information about the Communication Object or Signal. It is the KNX data type used to code the signal's value. It will depend on the type of signal associated in the external system in every case. In some integrations, it is selectable, in others it is fixed due to the intrinsic characteristics of the signal.
IntesisTM KNX – Modbus Master User Manual r1.0 eng 3 Modbus interface Description Intesis gateway acts as master in the Modbus RTU Network and the other Modbus devices connected to the same network communicating with Intesis must be always slave devices. The Modbus protocol defines different types of function codes to use to read/write different type of registers that can be found in Modbus devices, and also different data formats to encode values. See below (section 3.
IntesisTM KNX – Modbus Master User Manual r1.0 eng Points definition Each point defined in the Intesis gateway has the following Modbus features associated to it: Feature # Slave Description Modbus slave number to which the point belongs to. Function code One of the following Modbus function codes can be used: Read Func Write Func • • • • • • • • Data Coding Format One of the following Modbus data coding formats can be used: • • • • • • 1- Read Coils. 2- Read Discrete Inputs.
IntesisTM KNX – Modbus Master User Manual r1.0 eng 4 Connections Find below information regarding the Intesis connections available. KNX Port Connect the KNX TP1 bus to connectors + and - of gateway’s KNX Port. Respect the polarity Port A / Modbus RTU Connect the EIA485 bus to connectors A2 (A-), A3 (B+) and A1 (SNGD) of gateway’s Port A. Respect the polarity.
IntesisTM KNX – Modbus Master User Manual r1.0 eng Powering the device Power is supplied by power supply present in the KNX network (see section 4.2). Connection to KNX Connect the communication cable coming from the KNX network to the KNX Port (Figure above) of Intesis. Respect the polarity. In case there is no response from the KNX installation or KNX devices to the frames sent by Intesis, check that they are operative and reachable from the network connection where the Intesis is located.
IntesisTM KNX – Modbus Master User Manual r1.0 eng 5 Status LEDs Find below information regarding LEDs present in the device. L1 L2 L3 L4 LED KNX Programing Mode (L1) Power (L2) Port A activity (L3) Port A communication (L4) Colour Off Blinking red Off Green Off Blinking green Red Green © HMS Industrial Networks S.L.
IntesisTM KNX – Modbus Master User Manual r1.0 eng 6 Set-up process and troubleshooting Pre-requisites It is necessary to have a KNX device or interface operative and well connected to the corresponding KNX port of Intesis and a Modbus RTU slave connected to their corresponding port as well. Connectors, connection cables, PC to use the configuration tool and other auxiliary material, if needed, are not supplied by HMS Industrial Networks S.L.U for this standard integration.
IntesisTM KNX – Modbus Master User Manual r1.0 eng 6.2.3 General configuration Select General configuration tab to configure the Modbus connection parameters and number of signals to integrate. - Number of signals. Define number of Modbus signals to integrate. Once defined, it will create all communication objects required on the ETS Project. - Read on init delay. Time after initialization process to start uploading of all values in KNX network. - Modbus connection parameters. o o o o Baudrate.
IntesisTM KNX – Modbus Master User Manual r1.0 eng 6.2.4 Table All available KNX objects and its corresponding Modbus register and other main parmaters are listed in this table. Figure 6.3 Table tab For the KNX configuration as an internal protocol, the following parameters need to be considered: 1. Object name Descriptive name of the signal. It will be used to set the name of their communication objects. 2. DPT Select the KNX Data Point Type (DPT) to be used for each signal or KNX communication object.
IntesisTM KNX – Modbus Master User Manual r1.0 eng 8. Bit If using multiple bit (bit fields), it indicates the first bit you want to read 9. # Bits If using multiple bit (bit fields), it indeicates the number of bits you want to read 10. Operation It indicates if any operation is being applied to the signal. Posible operetations are multiplication and division per 10 and 100; and relational operator equal. 11. Operation value It defines an operand for the operation configured.
IntesisTM KNX – Modbus Master User Manual r1.0 eng Set-up procedure 1. Install Intesis in the desired installation site. Installation can be on a stable not vibrating surface. 2. Connect the KNX communication cable coming from the KNX network to the port marked as KNX Port on Intesis (More details in section 4). 3. Connect the communication cable coming from the EIA485 port of the Modbus RTU installation to the port marked as Port A of Intesis (More details in section 4). 4.
IntesisTM KNX – Modbus Master User Manual r1.0 eng 7 Electrical & Mechanical Features Enclosure Plastic, type ABS (UL 94 V-0) Net dimensions (dxwxh): 71x71x27 mm Color: White. RAL 9010 Mounting Wall. Power Supplied through KNX bus. See on KNX Port.
