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Banner Engineering has battery powered, industrial wireless radios designed to take a dry contact or low voltage wetted discrete input, and transmit the status to a receiver. (battery powered units use "flex power") The receiver radio has a discrete output, so in effect, the...

>Can anyone explain how the capacitance level switch is operating.< No, because you haven't told us which brand/model it is. >Can I connect it using the AS interface or the PA?< I've run into some capacitance switches with solid state, active voltage output; others with dry contact...

You can start at Modbus.org and download the spec and look at the tools: Participants in this forum are known to help out and reply, but as in most forums they won't do your work for you. An interesting phenomenon in Modbus/TCP is the issue of 'malformed TCP packets'. Mr. Hulsebos...

There's been a recent revision to ASME standard. The recently released PTC 19.3 revised a 35 year old standard that defines the criteria for designing thermowells for specific process conditions with a decided emphasis on safety. For years, various US industries have relied on 3...

Codesys is a development language for a variety of PLC's, many of which are the 'slice I/O' types. Codesys offers all of the programming methods demanded by the IEC 61131 'standard', although I'm told that implementation depth of each is very vendor specific. Check out the Codesys site ...

I've run into some of those stand alone PID controllers that can not handle fast (meaning multiple reads per second) via Modbus RTU comm, even though they can handle once per second updates. Before you do a whole project, you might want to check with West and ask if the 6100 can handle 2...

No experience with PM800, lots with Modbus, so curious a) why "Cat6 comm. line is wired and terminated (no ground though)" but you mention serial "Modbus RTU". Cat6 is normally associated with ethernet. A quick look at Schneider's site shows that the PM8ECC ethernet module is optional...

several isolator converters on this page will do mV to current conversion: http://www.api-usa.com/signalconditioners_dc_input.php

Have a Look-See at the manual: http://www.documentation.emersonprocess.com/groups/public/documents/instruction_manuals/d102762x012.pdf page 21 shows how to mount a 6030 on a quarter turn valve page 25 shows you pressure connections page 28, and on, show wiring The control output...

Jeffrey, > there is a selection to "Remove Echo". This needs to be selected when communicating through the RS-232/485 converters, but cannot be selected when in direct communication with the GC. Just to confirm what that means: When using Modbus poll between PC/RS-232 to GC/RS-232...

1) The sludge build-up against the flanged diaphragm or in the cavity formed by the housing and the diaphragms of the sensor prevents small elevation pressure changes from physically reaching the sensing diaphragm. Vibration or increased pressure moves the sludge the pressure gets through, the...

You didn't tell us - if both ever worked properly or if this is commissioning - if the slave #1 and slave #2 are identical devices or different devices Slave #2 might - not be connected to link/network (ethernet cable removed, wire loose) - not be powered (fuse blown) - be turned...

Thank you for telling us how it went. I'm kicking myself because I deliberately omitted an explanation of the dreaded 'One offset' issue, but you discovered it and solved it on your own. Good going. David

The P&F KFD2-STC4-Ex1 is a single channel 'smart' DC power supply and I/S barrier in a single package. The stated model number has an output on the 'safe' area side that is 0/4-20 mA capable of driving a load of 0-800 &#937;. If your indicator, presumably on the 'safe' side, requires a 0-10V...

How do you know that the HMI serial port that you are connecting to is setup to be a Modbus slave? HMI's are frequently Modbus masters. How do you know that yours isn't setup as a Modbus master. If it is the PLC master is trying to address another master.

If I were doing it, I would first use a USB-to-RS-485 converter on my PC and run a generic Modbus master like Modscan32 or Simply Modbus to make sure that I can read the GC and its 232/485 converter. Lots of things can go wrong there. If it doesn't respond, swap the A/B or +/- data lines...

The Modbus RTU or TCP Standards does not define the format of the data moved by Modbus beyond - an input/holding register is 16 bits; a 2 byte word per register. - Modbus ASCII defines the representation of the hexadecimal characters representing the bytes used in the PDU (?, the actual...

1) Have you confirmed all the suggested faults? - bad electrical connection to the slave device (Mr. Linse suggested swapping A/B or +/- lines) - master and slave are set to a different baud rate/parity setting (you're double sure that they're right?) You checked the wiring from the...

Scales are arbitrary representations. Where someone puts the zero on a scale depends on their interpretation of the situation. Just because the numbers are arbitrary, doesn't mean that the values are not meaningful numbers (nan = not a number) It appears that whoever set it up thought in...