Search results

Check out the frequency to current converters here (or anywhere you happen to be, they're standard devices) http://www.api-usa.com/signalconditioners_frequency.php Be aware that - you need to know your frequency limits, which should be apparent from your flow rate. - the power needed...

All pressure transmitters are differential measurement devices, it just depends on the what the reference side is connected to. What you call a 'normal' pressure transmitter is known as a 'gauge' pressure transmitter where the reference side is always open to atmosphere. That duplicates the...

No wonder the Emerson guy comes out to set up a Triloop. Look at the PC requirements (program comes on floppies) [from Triloop 333 manual (Rev BB) from the Emerson site]. Minimum Equipment and Software - MS-DOS based 386 computer or above - MS DOS® 5.0 or higher - 640K base RAM with 8 MB...

Emerson's supplement for Fieldvue HART defines "Burst mode message timeout" as Burst mode message timeout Tri-Loop not receiving burst command "3". So what could cause the the burst mode message to go missing altogether? - 3051 not configured for burst mode - I/S barrier or...

Severing the connection to the Mark VIe and powering it remotely changes the cabling, the power supply and the input resistance. I suspect that there's sufficient loop resistance if HART works at all. But better results by changing cabling and a power supply could be telling you that the...

A differential pressure measurement with capillary connected remote diaphragm seals across a primary flow element like a venturi, orifice plate or V-cone.

The first 3 links go to the ISA site but produce "page not found" errors. Without a title, it's hard to search for whatever was recommended. Which titles were suggested? > On loop checking: > On start-up: > On calibration: > and my favorite on troubleshooting,

Invensys calls the Foxboro T2550 a PAC (process automation controller) in the title of its manual, T2550 Foxboro PAC Handbook HA028898. That tells you it's not a DCS, its a PAC and probably makes it a direct competitor to Honeywell's HC-900. However, the Invensys download site requires page...

Modbus does not specify number formats. Formats are specified by the product vendor. Most references to floating point (FP) used with Modbus are for IEEE 754 floating point. The huge majority of FP is 32 bit, single precision floating point. 32 bits is 4 bytes, or 2 registers in...

ftp://ftp.icpdas.com/pub/cd/6000cd/napdos/et7000/document/application/labview/labview_modbus_eng.pdf

> Big-Little Endian I mostly work with 32 bit floating point (FP) and I've found the FP world splits about evenly into big/little endian. About half the time I have to go into that setting in Kepware that swaps the format and then the data looks OK. Off the top of my head, I don't know...

>are 1000 meters with 115200 baud achievable?< The distance depends on the entire network, and most RS-485 networks aren't engineered, they're ad hoc'd. Combinations of devices, device firmware, device 485 implementation, wiring and termination. Like Steve Myers mentioned, some of the...

I must be missing something here. Why do you think the frequency is any form of floating point? It even says "unsigned 32 bit". When the bits for both registers at 30052 are combined, (1110 1010) and (0101 1110), the result is 1110 1010 0101 1110, or 1110101001011110 without the spaces...

Sebastian, I prefer even parity because it avoids issues with the "10 or 11 character word size" issue when those few Modbus spec compliant masters actually expect no parity to have 2 stop bits. But I don't think I'm typical. Yes, even parity is needed. When there's a problem, the first...

The conventional, commercial off-the-shelf PLC reads data from field sensors, makes logic control decisions whose results drive motors/pumps You've got field sensors going to a PLC whose signals run through a calculation which then go back to the PLC to drive pumps or motors. What sort of...

You know how it goes, it seems rare that the user looks up the default settings. They just seem to start trying settings, hoping they hit pay dirt. I have to admit, that if the default settings were not apparent and I couldn't find them, that 115K baud rate would be far down on the list I'd...

1) >baud rate by DIP switch: What about the parity setting? 2) > Documentation will cover . . . Be sure to explicitly define - whether the register is read/write, or read only - the data format: signed or unsigned integer, floating point (real), long integer, whatever. 3)...

>1) Since the transmitter is not as per HART standard, is this system useful to client? I'll take your word that there's a converter that converts 4-20mA to a primary HART variable. The HART data (in this case, datum) is typically read from an analog input that is inherently a current...

> We installed 2 transmitters in parallel the other one was a Field bus FMR 245. The problem is the HART transmitter. That statement is confusing. Mr Zacharia has attempted to get a clarification. What does parallel mean? Does it mean that you installed two level transmitters on the...

What are you trying to accomplish that you connected two serial cards in parallel?