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Control.com topic...
Communications
Topic: Local and wide area networking in factory automation.
from the Forum department...
Modbus Isolated RS485 to RS232
Posted by noypi27 on 20 October, 2008 - 3:54 am
how can I convert a Modbus isolated RS485 to RS232? How can I communicate it?
Topic: Communications systems and equipment.
from the AUTOMATION department...
Communiation Type?
Posted by SRI GANESH on 19 October, 2008 - 1:16 pm
difference between Modbus Comm and Profi bus?
Topic: Sensor technologies.
from the Forum department...
modbus cable termations
Posted by Dean Williams on 19 October, 2008 - 3:05 am
What end of the shielded cable is supposed to be grounded.
Topic: Communications systems and equipment.
from the instrumentation department...
communication with different protocol
Posted by ganesh on 19 October, 2008 - 1:26 am
communicate plc and temperature controller from different make and having different protocols
Posted by techman on 18 October, 2008 - 3:49 pm
Problem communicating to Daniel GC through BridgeMux BM85 to a PC on Modbus RTU RS485/232 link
Posted by VK Aggarwal on 18 October, 2008 - 6:11 am
I need to connect a PC to RS232(RJ11) port on the FANUC PLC with CPU 363 using Modbus RTU protocol...
Topic: Communications systems and equipment.
from the Forum department...
Modbus Communication on RS-232
Originally posted by Emin Ceyhan on 17 October, 2008 - 3:01 am
Need information about Modbus Communication on RS-232.
New Replies:
You can use this gateway for example http://www.miille.com/266-P00-Ethernet.pdf If you have a...
Topic: Communications systems and equipment.
from the Forum department...
Omni Flow Computer and Honeywell TDC-3000
Originally posted by Vipul on 18 October, 2008 - 1:05 am
Implementation of MODBUS communication between Omni Flow Computer 6000 and Honeywell TDC-3000
New Replies:
Well we are also facing the same problem. The main problem is regarding the starting address of...
Topic: Communications systems and equipment.
from the Forum department...
Modbus communication with PLC
Posted by saritha on 14 October, 2008 - 4:46 am
I am working with at89c52 controller. I want to communicate with PLC using Modbus RTC protocol.
Topic: Sensor technologies.
from the Technology department...
Sensors with Modbus/TCP
Posted by Emin Ceyhan on 14 October, 2008 - 1:54 am
I need a sensor with Modbus/TCP protocol support.
Originally posted by Ajith on 1 April, 2008 - 11:13 pm
While communicating with slaves using Modbus master I am getting the following errors...
New Replies:
I have also the sma error but it the CP341 does not receive any data. I think there is some...
Topic: Communications systems and equipment.
from the ENGG department...
Modbus RS-485 RTU communication cable
Posted by Arjun on 11 October, 2008 - 7:55 am
I need the information/specification of of Modbus Rs-485 RTU communication cable for communication a PLC & DCS system.
Posted by Hannibal on 10 October, 2008 - 2:12 pm
How many Modbus devices can be placed on a single Modbus/485 loop using Prosoft module MVI56-MCM?
Topic: Communications systems and equipment.
from the Forum department...
Modbus communication
Posted by sunil on 29 September, 2008 - 12:03 pm
I am trying to communicate with ENERCON CONZERV ENERGY METER EM6434 having RS485 2 wire connection using SCHNEIDER TWIDO PLC and RS485 card inserted in port 2.
Topic: Communications systems and equipment.
from the serious department...
ModBus Exception on read only register
Originally posted by Enrico on 23 September, 2008 - 10:06 am
What exception code does the unit transmit if the master attempts to write a read only register?
New Replies:
Hello, Differing allowed. I knew when I posted the reply someone would come up and say but but...
Read-only registers are called "Input Registers". Read-write registers are called...
I beg to differ. The Modbus standard does define read/write for the 4 basic data registers in...
Acutally Input registers 0x04 and input coils (discrete inputs) 0x02 are essentialy read only. You...
Topic: Communications systems and equipment.
from the Forum department...
Modbus exception error
Posted by Zeeshan on 23 September, 2008 - 7:37 pm
I am having an issue talking to a SEL 2030...
Topic: Communications systems and equipment.
from the Automation List department...
Modbus RTU communication on RS 485
Posted by Anon on 23 September, 2008 - 2:05 am
Troubleshooting Modbus RTU protocol ommunication on RS485 looping
Posted by Giri on 21 September, 2008 - 6:06 pm
want information on the data type and formats for the Holding register and Input registers
Topic: Communications systems and equipment.
from the RS department...
Modbus RTU RS 485
Posted by Pieter on 18 September, 2008 - 1:26 am
Maximum length of RS 485 cable between 2 devices
Topic: Communications systems and equipment.
from the Automation List department...
IEC 62056-21 to MODBUS or DNP
Posted by Eduardo Wong on 13 September, 2008 - 1:28 am
I need help to convert from protocol IEC 62056-21 to MODBUS or DNP, it's for a thermoelectrical plant.
Topic: Communications systems and equipment.
from the R&D department...
Fire Alarm to BMS via Modbus
Posted by Voulgaris Thanasis on 13 September, 2008 - 12:57 am
Protocol Modbus for fire alarm panel to BMS
Topic: Communications systems and equipment.
from the PLC/HMI Drivers department...
WinCC communication with Modicon Momentum PLC
Posted by Shalin on 12 September, 2008 - 1:21 am
Siemens WinCC HMI package to communicate to a Modicon Momentum PLC using MODBUS interface
Topic: Communications systems and equipment.
from the FREC department...
Modbus Driver for WinCC
Posted by Alipour on 7 September, 2008 - 5:14 pm
I want modbus driver for WinCC 6.0 SP2
Topic: Communications systems and equipment.
from the ALLEN BRAIDLEY department...
MODBUS FOR PLUS II AB
Posted by DIANA HERRERA on 1 September, 2008 - 2:14 pm
Is modbus protocol available on the Variable Frequency Plus II?
Topic: Communications systems and equipment.
from the Engineering department...
Modbus master as DCS and HMI as slave
Originally posted by GPatel on 27 August, 2008 - 10:19 pm
Communication to DCS system
New Replies:
We offer a product that allows two or three Modbus Masters to connect to a single Modbus Slave (or...
Topic: Communications systems and equipment.
from the Instrumentation and Control department...
DNP3 on Delta V Emerson
Posted by Hildemaro Carrasquel on 27 August, 2008 - 10:13 pm
I am analyzing the posibility for connecting Emerson Delta V (Unit package to supervisory) with Open Protocol...
Topic: Communications systems and equipment.
from the Modbus Register List Rules of Thumb department...
Modbus Register List Rules of Thumb
Posted by Matt Mihalcin on 27 August, 2008 - 10:10 pm
Are there rules of thumb to abide when constructing a Modbus register listing w.r.t. floats (32-bit), and ints (16-bit)?
Topic: Communications systems and equipment.
from the Honeywell EPKS Modbus department...
ModbusRTU Write Coil with Pulse output
Posted by Prakashkumar on 26 August, 2008 - 4:57 pm
We have a problem with communication between Honeywell EPKS DCS with third party system through ModbusRTU for Writing Coil.
Topic: Communications systems and equipment.
from the Modbus application software department...
Modbus query problem
Posted by David Cemin on 24 August, 2008 - 8:54 pm
PLC didnt answer
Topic: Communications systems and equipment.
from the Automation List department...
Modbus function code 126 (7E Hex)
Posted by Jan Klasen on 20 August, 2008 - 12:50 am
What does function code 126 (7E hex) mean and what response could I expect?
Topic: Communications systems and equipment.
from the Automation List department...
To implement Modbus Poll
Posted by sonainv on 10 August, 2008 - 3:52 pm
To query the status of the Registers of an energy meter using MODBUS RTU protocol
Topic: Communications systems and equipment.
from the Automation List department...
Modbus Communication between Twido & Altivar 2
Posted by Naveed ahmed on 10 August, 2008 - 3:51 pm
Modbus Communication between Twido and Altivar 21
Topic: Communications systems and equipment.
from the Automation List department...
Carter Wind Turbine Controller Interface - Modbus?
Posted by Darran on 8 August, 2008 - 8:09 pm
Is there anyone out there that might know anything about the Active Control Inc. serial comms protocol used by Carter wind turbines?
Topic: Communications systems and equipment.
from the Automation List department...
Modbus Mini-din
Posted by Julie on 8 August, 2008 - 7:40 pm
Modbus Mini-din
Topic: Communications systems and equipment.
from the Automation List department...
MODBUS Bit Order
Posted by Dan Marr on 6 August, 2008 - 12:56 am
Modbus Bit order: LSB to MSB (Left to Right Reading), or MSB to LSB (Right to Left Reading)?
Topic: Communications systems and equipment.
from the Automation List department...
Modbus addressing models
Posted by Fred Wedemeier on 26 July, 2008 - 1:53 am
Usage of most-significant decimal address to identify a data type.
Topic: Communications systems and equipment.
from the Visual Basic ActiveX department...
Visual Basic App Interface to Ethernet/IP remote I/O
Posted by Mark Gustafson on 26 July, 2008 - 1:35 am
Looking for an ActiveX OCX to interface with Ethernet/IP remote I/O
Topic: Communications systems and equipment.
from the engineer department...
Modbus RTPS
Posted by Joe on 23 July, 2008 - 11:04 pm
Is anyone using Modbus RTPS protocol?
Topic: Communications systems and equipment.
from the SBK department...
Magelis via Modbus with Twido
Posted by Lapic on 17 July, 2008 - 1:47 am
Communications
Topic: Communications systems and equipment.
from the Automation List department...
XBT GT4330 problem communications
Posted by Lapic on 15 July, 2008 - 12:13 am
Problem with communications between Twido PLC and Magelis (XBT GT 4330).
Topic: Communications systems and equipment.
from the Help department...
modbus with DCS-CS30000 or foxboro
Posted by PC on 13 July, 2008 - 10:06 pm
scanning of bits for modbus with DCS-CS30000 or foxboro
Topic: Communications systems and equipment.
from the Engineering department...
Error codes in Modbus
Posted by Miguel Allende on 9 July, 2008 - 11:35 pm
I am trying to communicate one PLC with a Modbus slave via Modbus RS-485, but I receive the error code number 9.
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