Communication Between PLC and DCS
Student of Instrumentation eng. with final year project has a process loop control using DCS and PLC in master slave configuration.
Rexroth FE Modbus Control
Problems controlling a Rexroth FE variable frequency drive over RS485 MODBUS
I have two raspberry pi. One is master and other is slave. i want to show the GUI design of master in slave display also.
N-TRON Switches May Be Causing MKVIe Controller Diagnostic Errors
MKVIe Controller diagnostic errors possibly caused by N-TRON Switches
Comparison between DNP3 and MDLC
Technical comparison between MDLC (Motorola Data Link Communication) protocol and DNP3 protocol.
By Jacob Brodsky on 16 October, 2017 - 12:04 pm
As near as I can tell, MDLC is a proprietary protocol developed of, by, and for Motorola and their...
Control Network Architecture
Trying to improve the our plant control system network architecture
Noise Problem with VFD/motor
Posted by Joel Young on 13 March, 2005 - 2:21 pm
I have a noise problem associated with a VFD/motor (75HP 460v wye start/delta run) system...
By Marc Belanger on 11 October, 2017 - 4:19 am
>Sounds like an insulation breakdown/harmonic problem to me. >But it would really take more...
Communication between PC and PIC16 using MODBUS protocol
By striver on 10 October, 2017 - 3:01 am
Connect PIC to max485 and then use RS-485 TO USB converter on PC side interface which max485 in it...
Acromag 961EN and Micrologix
Posted by Jeremy Pollard on 9 October, 2017 - 10:12 am
Interfacing Acromag 961EN and Micrologix over Ethernet
SCADA without MTU, Is It Possible?
Connection between directly RTUs and ICSS, is it a SCADA system?
Modbus RTU 2-wire Master with 4-wire Slaves
Need help connecting a 2-wire Modbus RTU master (Honeywell Eagle) to 4-wire slaves (Mitsubishi FR-D700 series inverter), with the wiring or the requirement of a converter device.
Making Modbus/TCP **Much** Faster
Modbus/TCP can be considerably faster if TCP's capabilities are properly used.
Tags in Panelview Showing Error
Tags in Panelview HMI displaying error during operation
Modbus Network Issues - Units Randomly Stop Communicating
Modbus network randomly fails. Voltages go between 1-3 volts to 0 and 4 volts, nothing can communicate. Need help!
MODBUS RTU to RS485 Configuration
Posted by Shandene Solomons on 13 September, 2017 - 6:24 am
I'm trying to set up comms from a PLC to a VFD using MODBUS. PLC has RS232 and VFD has RS485 running through a RS232 to RS485 serial converter.
Recieve data via Modbus using GW4
Connecting FA-M3 PLC to Matrikon OPC for Modbus
Connect the Yokogawa FA-M3 PLCs to Matrikon OPC Server for Modbus
26 pin 0.5 Pitch Round-to-Flat Cable
Posted by Alex Crofford on 29 August, 2017 - 8:24 pm
Looking for a source of 26p 0.5mm pitch round to flat male to female cables.
3 way valve with a 4-20 ma positioner in it. Is it possible to take current input at two same cards of different PLC racks?
SMS from PLC for Hearing Impaired Worker
I am looking for a way to send SMS text messages based on PLC I/O states.
By NO Name on 25 August, 2017 - 1:56 pm
I have more experience with ab plcs, but Siemens should be able to send the same commands. I use...
I would like to be a control engineer in the wood products industry. What is the training learning curve like for new hires in this industry?
Modbus TCP/IP Valve Positioner
TCP/IP Packets on A-B CompactLogix
Is it possible to parse TCP/IP packets (not Ethernet-I/P) in 5380 CompactLogix processors?
By Bob Peterson on 21 August, 2017 - 7:45 pm
There is a knowledge base article on the Allen Bradley website that tells you how to do this....
Multiple Connect Request from Same MBTCP Master
Can same master/Client establish multiple Modbus TCP connections to same slave/server???
Modbus RTU to 2 Master Devices
Modbus/RTU slave device to communicate with 2 master devices: 1 master via Modbus/RTU and other master via Bacnet/IP
By Jerry Miille on 1 August, 2017 - 11:57 am
We have been selling a product for many years that will allow multiple Modbus Masters to...
MODBUS Times Out When using a USB to 232 Converter on PC
Monitoring ATS with a PLC, anyone with experience?
Serial/USB Modbus to Labview
Modbus serial to USB converter and LABView
Does Somebody Know What This Communication Processor Is For?
Found a Siemens PCI communication processor in an old computer and I don't know what it is
By Dick Caro on 15 July, 2017 - 8:56 am
I did a Google search on that model number and found this: COMMUNICATION PROCESSOR CP 1613 ...
Cryptography and digital signatures in SCADA Networks