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Contact Saftronics and ask them how to repair or replace the drive's keypad/display. https://www.saftronics.co.uk/contact-us/

Electronic differential pressure transmitters are commodity items nowadays (really old pneumatic output DP's are not, they are obsolete) - there's a dozen major league players that produce excellent, reliable products. Their origins were for flow measurements across orifice plates in the...

>I’m assuming that the master must poll every single slave all the time to read some discrete input state but since I don’t see any real life proof of concept it must be because modbus protocole isn’t suited for that? I have a hard time figuring out if the polling of every slave can cause...

The output has to be used by the controller's physical output - the 4-20mA output or time proportional on/off modulation within the cycle time period. So output is 0-100%.

>So PID formula will only apply during (100 - (40/2)) to (100 + (40/2)) . i.e 80C to 120C. If measured temperature is current below 80C, then output is 100% on & if above 120C then output is off completey? Is this it means? I did not read all the subsequent posts some of which seem to...

Please use a statement like "Modscan can read register xxxxxx" instead of "I can read register 4000" because "I can read" it does not inform the community as which application (Modscan or Kepware) reads register 4000. The photo you posted shows Modscan reading (3)4xxx: Input registers. floating...

>Will change in sheath OD causes any change in accuracy of T/C? No, no change in accuracy.

I can't recall where I got these, but E is Exposed, G is grounded and U is Ungrounded

1. Presumably you have a manifold valve between each pitot tube and its DP transmitter. Swap/exchange one of the three good-working transmitters with the bad boy transmitter. If the problem moves to a former working-good location, then there's an issue with the transmitter. If the problem...

Your corporate limit of 6m of capillary length is somewhat less what is available for commercial remote seal assemblies from major vendors (depending on diaphagm size). Commercial capillary length limits are likely due to - a xmtr-capillary-diaphragm combination accuracy limits at reference...

I'd say you're lucky if you've only encountered one FP format over a number of years working with Modbus. For integer info, I'll refer you to Wikipedia's page on integers because I'm not a programmer, just a Modbus implementer. https://en.wikipedia.org/wiki/Integer_%28computer_science%29...

Executive summary: Endianess can be and is different for data formats than it is for the bit order in serial transmission Section 4.2 in the "MODBUS Application Protocol Specification V1.1b" is source of your quote "Modbus uses a big-Endian representation for addresses and data items." Here's...

This is known as a Zombie thread, rising from the dead. The original question was asked in 2004 and answered in 2005 and now you re-open it in 2020, a testament to the power of search engines. You might luck out and someone reading this will have 15 year old software and some experience, and...

1. Is this a correct summary? At the present time the measuement system is: A. Probe #1 is Type T Thermocouple with a temp transmitter sending a 4-20mA signal scaled 0-160 Deg C to a DCS. B. Probe #2 is Type T Thermocouple with a temp transmitter sending a 4-20mA signal scaled 0-160 Deg C to...

>(on one side is 145 bar, on other 1 bar) This is a differential pressure transmitter (DP) transmitter?

Check out the IEC60034 duty cycle classes or designations S1 through S8 that categorize the conditions under which a motor operates and its ability to withstand heat. table: https://www.engineeringtoolbox.com/iec-duty-cucles-d_739.html with load and temperature graphs...

Did the flowmeter ever work properly? Was the meter "sized" by the vendor/rep for the flow rate or just purchased with the same line size as the piping? What are the numbers? What is its configured flow range? at what flow rate does the meter read? at what flow rates does the meter not...

The quick answer - there's no problem using roughly 18g wire for a 2 wire, loop powered transmitter over 150m. Yes, the current used for the calculation is the loop current, but 4-20ma covers only the measurement range without taking into account the fault indication current which can be as...

Actually the elevated "live zero" that you describe is convenient for detecting broken wire open circuits, but it is a secondary reason for the widespread use of 4-20mA signals. The primary reason that 4-20mA is used instead of 0-20mA is because an elevated 'zero' allows for powering the field...

https://lmgtfy.com/?q=difference+between+repeatability+and+reproducibility+of+a+measurement+system+%3F