Search results

So you've confirmed that the transmitters do not support Modbus RTU in their current configuration. If you installed Modbus RTU on the transmitters, then yes, the open source app would communicate with the transmitters. But. There's a big But. Whether that open source app will be of any...

The protocol on the first couple pages is a proprietary ASCII protocol; it is NOT the Modbus ASCII protocol. page 6-5 in section 6.2.3 states that Modbus RTU is documented in Section X (10). Note that on many devices, Modbus in any form might well be an option that has be purchased, it might...

Since this Zombie thread has come back from the dead, I'll take the opportunity to post the link to a free instrumentation and controls book available in standard pdf format. The book includes the fundamentals of math, chemistry, physics and electronics, but the bulk is about instrumentation...

One would hope that the factory would provide information, but Honeywell had no one who could or would answer actuator questions. If it wasn't printed in the spec sheet or manual, you were on your own. Back 15 years ago, Beck could not provide a wiring diagram without the serial number from...

Good luck answering your question. I'm told IEC 60034 covers motor duty cycles, but I don't have a copy. When I dealt with 90/160° actuators (typically on valves, occasionally on a damper) I could not find a factory guy to explain which "S" class category their smaller torque (HVAC) motors...

One, FSC, is a safety controller; the other, Experion PKS, is a process control system. This page says that Honeywell's FSC was a first generation Fail Safe (Safety) SIL3 Controller, it is now obsolete and has been replaced by Safety Manager...

The motor can be running 80% of the time. It can run 48 minutes in an hour. If it runs more than its rated duty cycle then the motor tends to over heat.

I concur with Chris T

bench-made sniffer DB9 hardware here: https://electronics.stackexchange.com/questions/63865/rs-232-serial-sniffing another construct-a-cable: https://store.chipkin.com/articles/rs232-how-can-i-do-serial-port-sniffing-snooping-through-rs232

Presumably the multivariable/DP transmitter has materials of construction suitable for contact with either a liquid or a gas process. And presumably the multivariable/DP transmitter has a pressure rating to allow it to survive the DP it encounters in the process. But, on a steam line, by...

A cycle timer? Like one of these? https://www.ezautomation.net/eztimer/pdfs/EZ-CYCLE-Timer%20v3.2.pdf

> Instrument 2 is in the atmosphere ( so not tank) Usually the smart transmitter command to "zero" is used to zero out any offset due to either - mounting position, physical tilt of the sensor's diaphragm or position - applied pressure due to the installation circumstances If the instrument...

I do not understand your interpretation of the HART device poll response of 03hex as being slaves 1 and 2. The table on page 5-16 shows 03hex as Slave 4. How do you get slaves 1 and 2 from the table information? Does your master use zero-based addressing? If you're polling 30296 (one-based)...

That's a lot of nice application packages. That RKA SB1 is nice little electric heater controller. I like the combination DIN rail/flange-wall mount option with brackets for pipe mounting, something none of the vendors offered when I was spec'ing that stuff. Did any of your customers ever use...

Shame on Proface tech support for not recognizing this wiring/enabling issue with Modbus on their own HMI's.

The GP-4210-TM'"s RS-485 DB9 wiring connector diagram is shown below. It's 4-wire RS-485. 10 years ago, a guy who wrote code for gateways (Linse) mentioned potential problems with wiring 4-wire RS-485 masters as 2-wire (jumpering the driver lines Tx(+) jumpered to Rx(+); Tx(-) jumpered to...

I can't help with Proface, but I can suggest that you get a USB/RS-485 adapter with the FTDI chipset and download the Open Modscan freeware app (a generic Modbus Master app) and use it to confirm that an RTU master can read a slave, the TK4S. Open Modscan and its download link is mentioned in...

For the record, the US commercial heat treating industry used paralleled thermocouples between a controller and a recorder for at least 4 1/2 decades, 1950's through the mid 1980's, and there are some that still maintain the practice today. It can work. The continuous process industries that use...

The verificator. Another suitcase magic box. It does what it does. Spits out a go or no-go. Still works with a serial port after all these years (with software limited to using only COM ports 1-4). How convenient! And you're supposed to believe the results because it has a Siemens...