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Control.com topic...
Communications
Topic: Communications systems and equipment.
from the Automation List department...
Modbus TCP function for PHP
Posted by Volzon on 11 December, 2007 - 10:59 pm
I'm making a logging function on a Linux system.
I need a PHP function to read from a PLC using Modbus TCP. Or another way of reading data from Modbus TCP an placing it in a MySQL database.
Topic: Communications systems and equipment.
from the Automation List department...
MODBUS connection, interruption in Data stream
Posted by Shiva on 8 December, 2007 - 12:49 pm
It's about an interruption in MODBUS data transfer.
Topic: Communications systems and equipment.
from the Automation List department...
AB PanelView communication over Modbus
Posted by Muahammad Asim Khan on 8 December, 2007 - 2:01 am
AB PanelView communication over Modbus
Topic: Communications systems and equipment.
from the Automation List department...
PM9C Voltage Scaling
Posted by C2k on 6 December, 2007 - 10:02 pm
How to convert raw values to engineering units
Topic: Communications systems and equipment.
from the MAINTENANCE department...
Bad Communication on Modbus
Posted by DAMENE on 4 December, 2007 - 9:59 am
Help me to find the communication problem DCS MARK 5 over MODBUS
Topic: Communications systems and equipment.
from the modbus communication department...
PLCG-tdc3000
Posted by Arie on 4 December, 2007 - 9:53 am
The slave doesn't respond...
Topic: Communications systems and equipment.
from the Automation List department...
MEI Transport and Exception Response Oddity
Posted by Ivo Bauer on 4 December, 2007 - 12:20 am
How exactly does the standard format of the exception response for MEI Transport function look? Different versions of Modbus Application Protocol specification contradicts with each other on this...
Topic: Communications systems and equipment.
from the Sooty department...
Modbus Comms problem
Posted by Gavin Taylor on 4 December, 2007 - 12:08 am
Modbus problem on Siemens S7-300 Modbus Slave
Posted by Van on 26 November, 2007 - 10:59 pm
I was referred over here from www.MrPLC.com. We are developing a PC application in C/C++ and need to communicate to one or more Omron PLCs (CJ1M CPU12).
Topic: Communications systems and equipment.
from the Automation List department...
SMS to DNP3/Modbus/OPC Data Converter
Posted by Glen Downie on 21 November, 2007 - 1:42 am
Converting data contained in SMS text messages to DNP3/Modbus or OPC Data types/protocols.
Topic: Communications systems and equipment.
from the Automation List department...
Twido Modbus EXCH function
Posted by Leonardo Magno on 20 November, 2007 - 8:06 pm
How to configure the function EXCH?
Topic: Communications systems and equipment.
from the Product Design department...
Suppliers of standard Modbus client software
Posted by S.Karthikeyan on 20 November, 2007 - 7:58 pm
We are looking for the suppliers of standard MODBUS client SW to integrate into our product.
Topic: Communications systems and equipment.
from the Automation List department...
Allen Bradley + MODBUS/RTU
Posted by Alejandro on 17 November, 2007 - 1:09 am
Does anyone know if there is any device or product to interface SLC 500 5/03 to a MODBUS/RTU network of other brands and devices?
Topic: Communications systems and equipment.
from the Twido department...
Interfacing Twido with Bristol Babcock RTU
Posted by James on 15 November, 2007 - 2:24 pm
Twido communications with PC
Topic: Communications systems and equipment.
from the Automation List department...
Jbus to Fieldserver communication
Posted by Shyam on 13 November, 2007 - 11:46 pm
How to communicate UPS with PC through Fieldserver
Topic: Communications systems and equipment.
from the Automation List department...
Magelis XBT N401 to 170 CCC 980 30
Posted by mustafa on 9 November, 2007 - 1:35 am
Magelis Error Message
#203 Dialogue Table Reading Impossible.
Is this a communication error?
This is my first Magelis XBT N401 project.
Topic: Communications systems and equipment.
from the SCADA department...
Modbus reply message
Posted by Jason Phillips on 7 November, 2007 - 8:06 pm
When polling sites, modbus message response is [15].
Topic: Communications systems and equipment.
from the Automation List department...
Identifying Modbus Elements
Posted by Vicente on 6 November, 2007 - 8:20 pm
How to identifying elements in a Modbus net.
Topic: Communications systems and equipment.
from the Protocol department...
Modbus on Microchip PIC16F877
Posted by Elamaran on 2 November, 2007 - 8:36 pm
Regarding Modbus Mapping
Topic: Communications systems and equipment.
from the Automation List department...
Communications master - slave
Posted by Anonymous on 30 October, 2007 - 11:08 pm
Communication between a Wago PLC Modbus master and slave devices through RS485 serial interface module 750-653/003-000.
Topic: Communications systems and equipment.
from the Automation List department...
Modbus integrator
Posted by Shyam on 27 October, 2007 - 1:07 am
J-bus to Modbus communication
Topic: Communications systems and equipment.
from the Automation List department...
ModBus serial driver
Posted by Harshad on 25 October, 2007 - 10:53 pm
Looking for ModBus serial driver source code for WinCE.
Topic: Communications systems and equipment.
from the E&I department...
Yokogawa DCS
Posted by Naeem Tahir on 25 October, 2007 - 12:58 am
RS-485 communication
Topic: Communications systems and equipment.
from the Automation List department...
MBP STAT
Posted by bigbilly on 21 October, 2007 - 5:52 pm
MBPSTAT UTILITY
Topic: Communications systems and equipment.
from the SCADA Systems department...
Using CITECT to - R/W from SEPAM 40,80
Posted by Andi on 20 October, 2007 - 8:54 pm
CITECT - R/W Sepam40,80 with BM85 and EGX200/400
Topic: Communications systems and equipment.
from the Automation List department...
J-Bus Vs Modbus
Posted by Shyam on 20 October, 2007 - 7:30 pm
Modbus RTU protocol Vs J-bus protocol.
Topic: Communications systems and equipment.
from the Modbus, Serial Comm department...
RS 485 Comm Problem
Posted by Ibrahim Colmenares on 9 October, 2007 - 11:27 am
The Modbus communication has a very strange problem I have never seen; the replies to the requests comes from the wrong slave!!!
Topic: Communications systems and equipment.
from the Automation List department...
Newbie question: Modbus TCP/Serial/ASCII/RTU
Posted by nil_dib on 6 October, 2007 - 12:27 am
A bit confused about the protocol layers.
Topic: Communications systems and equipment.
from the Automation List department...
S7 to Quantum - Modbus communications
Posted by A Dobson-Holt on 6 October, 2007 - 12:03 am
I am trying to set up a Read/Write communications from S7 PLC to a Quantum using the S7 Modbus TCP Driver from Siemens. I am having difficulty getting any communication between the two...
Posted by Alberto on 4 October, 2007 - 9:51 pm
Modbus assembler source code or library.
Topic: Communications systems and equipment.
from the Automation List department...
Question about using TDR
Posted by Frankis on 2 October, 2007 - 11:21 pm
Apply TDR on Modbus+ network.
Topic: Communications systems and equipment.
from the How the hell to start...? department...
Talking to a 3216 Eurotherm controller (Borland C++ Dev Studio)
Posted by Yotsmach Yehusiahu on 28 September, 2007 - 12:40 am
Communication with a Eurotherm 3216 control box via Modbus (RS232) on a Borland Developer Studio platform (Win XP).
Topic: Communications systems and equipment.
from the Remote IO department...
DNP3i Remote IO Modules
Posted by Mark Mullins on 27 September, 2007 - 12:17 am
Require DNP3i (Ethernet) Remote IO modules
Topic: Communications systems and equipment.
from the Automation List department...
Modbus Ethernet vs. Modbus TCP
Posted by leemark on 26 September, 2007 - 11:58 pm
Modbus Ethernet vs. Modbus TCP. What's the difference?
Topic: Communications systems and equipment.
from the Automation List department...
ModBus slave RS485 direction switch times Rx/Tx
Posted by Karl-Heinz Domnick on 22 September, 2007 - 12:23 am
At which time you may/must switch at the ModBus RTU Slave with RS485 2 wire for responding of Rx to Tx and when back?
Topic: Communications systems and equipment.
from the Automation List department...
New to Modbus and clueless...
Posted by bcics on 19 September, 2007 - 11:05 pm
Standard Automation MB Slave driver for Intouch - talking to Logix5000 controller. Master is a Cimplicity HMI.
Topic: Communications systems and equipment.
from the Automation List department...
VB6/PLC communication
Posted by Devant on 16 September, 2007 - 1:31 pm
connecting to an existing plc system and retrieving data for research from it...
Topic: Communications systems and equipment.
from the programmer department...
Modbus master on Twido
Posted by chinatan on 13 September, 2007 - 2:39 am
Can you give a sample code for Modbus master on Twido?
Topic: Communications systems and equipment.
from the Automation List department...
Modbus and Citect
Posted by yan_comm on 11 September, 2007 - 10:58 pm
Small SCADA project for electricity monitoring
Topic: Communications systems and equipment.
from the Automation List department...
Time Stamping
Posted by Punit Sharma on 10 September, 2007 - 11:35 pm
Does Modbus protocol support time stamping?
Topic: Communications systems and equipment.
from the Drivers department...
NAK with function code 6
Posted by Muzammil Nasim on 8 September, 2007 - 12:21 pm
What does exception code 7 mean. Is it NAK?
Posted by Dixit on 8 September, 2007 - 12:10 pm
I want to design a software in "C programming language" for Atmel microcontrollers.
Topic: Communications systems and equipment.
from the Embedded Domain department...
MODBUS Protocol
Posted by Pro on 5 September, 2007 - 11:36 pm
Query on a particular function code in MODBUS protocol
Topic: Communications systems and equipment.
from the Automation List department...
DMX-512 To Modbus RTU
Posted by Bob C on 1 September, 2007 - 11:07 am
DMX-512 To Modbus RTU
Topic: Communications systems and equipment.
from the Automation List department...
Modbus design that can handle both 2-wire and 4-wire
Posted by Stephen Buttigieg on 30 August, 2007 - 8:10 pm
Currently trying to design a Modbus device that can handle both 2-wire and 4-wire connections.
Topic: Communications systems and equipment.
from the instrumentation & control department...
Comunication between two PLCs of different manufacturers
Posted by sarfraj patel on 30 August, 2007 - 8:09 pm
Communication between two PLCs: GE Fanuc & Allen-Bradley using Modbus RTU protocol.
Topic: Communications systems and equipment.
from the Automation List department...
PM500 Modbus problem
Posted by longman555 on 30 August, 2007 - 1:08 am
PM500 Modbus problem with AMJR-14
Topic: Communications systems and equipment.
from the Automation List department...
Communicating with a third party VFD from Vijeocitect
Originally posted by dany on 28 August, 2007 - 2:05 pm
I need to communicate with a third party VFD
(variable frequency drive) from Vijeocitect.
New Replies:
A Modbus driver would seem appropriate....
Topic: Communications systems and equipment.
from the How do I talk to these things? department...
Newbie needs help with Modbus
Posted by Andy on 28 August, 2007 - 2:44 pm
Need some direction.
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