val_99

It is perfectly OK to convert PID loop output into timing function. You also need to establish duty cycle time and apply PID output to it. Also limit your min. value as you do not want to have your contactor to switch as crazy. Personally I would never recommend to have a traditional contactor in this case - only solid state relay. Your contactor will not survive for long time.

Hi guys, Anyone know how to disable a numeric input object from entering value at certain conditions? In my case I would like to disable altering some of set points, based on a security level. Only solution I have found - making numeric display on top of numeric input field and toggle visibility of both objects. I could do it in ME using conditional instruction in an expression field under "connections", but SE does not have such option. Any suggestions? thanx

PLC Law #20: [ 52: 2014 EDITION] Don't trust anyone's description of a problem. Verify yourself!!! PLC Law #21: [ 53:2014 EDITION] Before making any requested changes, make sure you understand what is indeed requested. It is often people speak different "languages"

Still no answer? OK I can say only for myself. I'm using independent communication between HMI and PLCs. Multiple PLCs talk to one HMI independently. This way you achieve max. flexibility (in case some of PLC are down). Never had a problems.

I have developed a project utilizing Allen-bradley ControlLogix PLC, Hart analog input module 1756-IF8H and PanelView Plus. I can view major data and perform basic smart transmitter settings, including range (both for analog and hart parts), zero transmitter, tag ID and damping time. I'm attaching an image so you can get an idea of what it is. This utility is not intended to replace HART smart communicator, but simplify some basic routines and diagnostics. Anyone who is interested can get a copy of PLC and PanelView Plus code for US$20.00. Real support not included, but I may answer some basic questions.

Hi guys, Lately I was involved into a project utilizing 1756-IF8H HART analog modules. Standard features described in module manual include only basic analog module configuration, description of data arrays and couple of examples of direct Hart Transmitter access in order to pull data for monitoring. Using CIP messaging I was able to develop basically HMI based HART transmitter configuration utility for basic configuration tasks such as: zeroing, entering tag name, entering Hi and Lo range values, monitoring mA value,entering damping time value. In my case, HMI interface was developed for RSView SE and for ControlLogix PLC V.16 I'm curious if anyone was doing anything like that, so we may share our ideas.