Table of Contents
Advertisement
Modbus Server – BACnet Client
TM
Intesis
Modbus functions 03 and 04 (read holding registers and read input registers) can be used to read Modbus registers.
Modbus functions 05 and 15 (Single digital Holding Registers and Write Multiple Holding Registers) can be used to
write Modbus registers.
Modbus functions 06 and 16 (Single Multiple Holding Registers and Write Multiple Holding Registers) can be used
to write Modbus registers.
If poll records are used to read or write more than one register, it is necessary that the range of addresses requested
contains valid addresses; if not the corresponding Modbus error code will be returned.
All the registers are of 2 bytes, even if they are associated to signals of type bit in the external system, and its content
is expressed in MSB..LSB.
Modbus error codes are fully supported; they will be sent whenever a non-valid Modbus action or address is required.
Modbus RTU
Baud rate can be selected from 1200, 2400, 4800, 9600, 19200, 38400, 56700 and 115200.
Data Bits:8
Parity can be selected from: none, even, odd.
Stop Bits:1 and 2.
Modbus slave number can be configured. Physical connection (EIA232 or EIA485) can also be selected.
Only the lines RX, TX and GND of the EIA232 connector are used (TX/RX+ and TX/RX- for EIA485).
Modbus TCP
The TCP port to use can be configured (by default 502 is used).
The IP address, subnet mask and default router address to use by Intesis can be also configured.
Address Map
The Modbus address map is fully configurable; any point in the Intesis can be freely configured with the desired
Modbus register address.
Points definition
Every point defined in the gateway has the Modbus Format, Point and R/W features associated to it that can be
configured. These features are explained in section 5.2.4.
Each point defined in Intesis has the following Modbus features associated to it:
Feature
Description
#Bits
One of the following bit lengths can be used:
One of the following Modbus data coding formats can be used:
Data Coding
Format
•
•
•
© HMS Industrial Networks S.L.U - All rights reserved
This information is subject to change without notice
•
1 bit
•
16 bits
•
32 bits
16/32 unsigned.
16/32 bits signed (one's complement – C1).
16/32 bits signed (two's complement – C2).
User Manual r1.3 EN
URL
https://www.intesis.com
10 / 27
Advertisement
Table of Contents
