level transmitters for closed drain system
Placing a Motor in an Explosion Proof / Intrinsically Safe Location
What are the physical/electrical barrier requirements if I want to locate a motor in a hazardous location with its associated drive outside of the hazardous location?
By Bob Peterson on 9 December, 2016 - 12:42 pm
One other thing. In general, Division 1 areas are surrounded by division two areas. So even if...
By Bob Peterson on 6 December, 2016 - 8:52 pm
this is not really a DIY type of project. You might want to get some experienced help. Having...
Bad PV Alarms in RS3/DeltaV Inputs
Posted by Joao Queiroz on 9 December, 2016 - 9:53 am
Bad PV Alarms on analog measurements in conversion from RS3 to DeltaV.
Magnetically Coupled Drives
Can I use a magnetically coupled drive work through 2 inch thick polypropylene?
BS-4999 Part 142 Vibration
What is the requirements of BS-4999 for Vibration monitoring?
Proface HMI GP 4301 TW screen blinking
We have an 220 VAC solenoid at one of our McQuay Chillers. It is used as part of its expansion valve. We have been facing overheating issues for a while.
By Vinay 123 on 30 November, 2016 - 9:22 am
As voltage is directly proportional to the core loss, it definitely should be increasing with...
Walkie Talkie Interference
Keying microphone(s) causes computer LCD monitor to black out.
GE Mark VI S Controller Failure
GE Mark VI controller S status offline several days after startup
Modbus function code 03 and 04 confusion
By Harvard on 2 December, 2016 - 12:06 pm
Function Code 4 is used to read analog inputs that come from an analog to digital converter and...
Citect v7.40 SP2 - Modbus/TCP - Request Wrong Word Count
Citect is sending wrong Modbus requests to my Moxa gateway. Word count is bigger than it should be - 7A HEX instead of 2.
Driving an Analog Output Module of Phoenix Contact with Foxboro IA System
A problem writing a value to Analog output module of phoenix contact using Modbus. Control system is Foxboro IA series V8.2. Modbus module is FBM230.
Looking for recommendations for an evaluation board for a BLDC hub motor.
WattStopper HLINKCC and Old Lighting Integrator Panels
Interfacing with an old Wattstopper HLINKCC and LI LCPs
3 Way Valve Drain Port "Vent"
Benefit of 3 way valve drain port, stamped "vent"
Implementing Modbus RTU system (PLC to 4 slaves). Necessary to set the polling delay to 100mS. No indication of polling delay requirement in Modbus Protocol. Why a delay?
By Graham Pyatt on 18 November, 2016 - 3:38 am
>It is a common misconception that doubling (or 4 fold >increase) will result in the same...
By Graham Pyatt on 17 November, 2016 - 7:47 am
>The required (Turnaround) delay is most likely due to 1/2 >duplex physical layer like 2...
By Harvard on 16 November, 2016 - 11:59 am
The required (Turnaround) delay is most likely due to 1/2 duplex physical layer like 2 wire RS485....
Gas Flowrate and Volume Measurement
Disparity in volume of gas captured by barton chart recorder from a gas vending company and ABB totalizer used the gas fired power station.
Cascade PID for Density & Flow Control.
Density & Flow Control with dosing in line.
Basic difference between Zone-2 and Zone-1 equipment
Exd/Exe equipment for Zone-2 and Zone-1
By will hunt on 11 November, 2016 - 12:24 pm
Hello Please be careful following zone 1 and zone 2 certifications. They are designed to protect...