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My mistake in post #3. I meant to insert the screen shots for FC01, but by mistake inserted the screen shots for FC05. I have edited post #3 so that the screen shots for FC01 are where they are supposed to be. I'd suggest working through the FC01 example, where it reads coils 11-23...

There was a discussion some years ago, here, about Geiger Mueller tubes https://control.com/forums/threads/frequent-failures-of-geiger-muller-tubes.25082/ Curt Wuollet, where are you? Any further comments, given the fine scope trace provided?

I once heard a rumor that a very high end flow calibration lab actually calibrated a gas meter on a gas blend (not air, but a blended gas) for what amounted to a small fotune. It seems that the standard flow calibration flow stands use water. Those technologies that need it, provide a K factor...

1. >the specs say that there can be up to 2000 coils, but it doesn't say that a device must support to read 2000 coils, whether they are all used or not, or if the limit can be lower. There is no requirement to provide more coils than the device supports. It never makes sense to have...

A quick skim read of the EA Comm manual reveals a non-Modbus anomaly that contravenes the Modbus standard/spec, which, in my mind, makes it a proprietary protocol, not Modbus. Being proprietary, customers will encounter problems getting a Modbus compliant master/client to communicate with your...

If you're gonna write code you need to get the Modbus standard. It's written pretty clearly and is a free download from http://www.modbus.org/docs/Modbus_Messaging_Implementation_Guide_V1_0b.pdf check out pages 4-6 for the header format.

A Modbus master is the 'client', which sends a message to a slave/server. The server/slave processes the master/client message and sends a response. The time required for the slave/server to begin to send a response varies from brand/model device to device, on the order of milliseconds to...

0x20 0x00 is not a valid Modbus message, but it is ASCII space NUL which sounds like a proprietary ASCII reply. The last page of the 75363 manual is an ASCII table. The slave map on page 2, section 4.4 of the 97519 manual says that starting at register 0041 (hex, zero based; 66 decimal, one...

I'm long out of the test and measurement instrumentation market, but I suspect that modern day waveform or frequency generators can make the signal wave forms you want and that an audio band amplifier is probably capable of creating the voltage range you need. Google is your friend.

Analog Inputs Honeywell offers 2 choices for analog input modules (universal (mA. V, RTD, T/C) and hi-level (mA or V). I've found Honeywell AI modules have great isolation. Galvanic isolation spec for both AI cards is 400 VDC point to point; 1K VDC input to logic (back plane). Both use a 15...

12-13 years ago Walt Boyes was looking for the same thing, specifically to publish. https://control.com/forums/threads/benchmark-for-control-systems.27895/ Walt might have retired by now, but try finding him at Spitzer and Boyes to see if such a study was ever published. I have my doubts...

Assuming that some vendor somewhere offers insulated copper wire for undersea service AND for robotic service that can handle the required 10 million flex cycles, then use that because the only requirement for RTD extension cable/wire is that all three conductors have the same gauge and hence...

Google ISA 101 for HMI standards. Lots of presentations, tutorials and white paper articles on the topic.

The error typically indicates that the PC serial port Modpoll is attempting to use is already in use by another application. Did you check Device Manager to see which COM port your USB/RS-xxx converter is installed on? Is it installed on COM8? Do you have a 2nd instance of Modpoll running in...

I can't help you with the Siemens master, but I can tell you a sad tale about the Honeywell UDC 2500. The Ethernet IP address can only be configured with Honeywell PIE software. There is no means to configure the IP address via the keyboard. The default IP address for the 2500 Ethernet card...

The signal conditioning module API 4402G does the math (A+B)/2; the average of 4-20mA signal A and 4-20mA signal B. https://api-usa.com/pdf/api/api4400g-4408g.pdf

There are general purpose isolators (4-20mA in; 4-20mA out) that are not rated for intrinsically safe application; they're just used for isolation. If that's what you call an 'isolator' then a general purpose isolator is different from an I/S rated isolated barrier.

I don't know the details of turbine combustion, but in general, I have to ask, 1) is the replacement technology rated for continuous duty? Some UV detectors will latch "ON" (fail un-safe) after continuous exposure to a flame. A mechanical shutter mechanism is used to block the UV and the...

Thanks for the update. Someone is likely to benefit from your experience in the future.