Posts Tagged troubleshooting
Video: Troubleshooting a Maxon Shutoff Valve
Posted by danstips in Honeywell, Safety Control, Troubleshooting on November 30, 2015
We understand the inconvenience that comes with having to send an instrument out for repair, so at Lesman we try to help you determine what’s wrong with your device before you remove it from service. After all, we don’t want you to lose any uptime if it’s something that can be fixed in the field.
Changing the COM port for a USB HART modem in Pactware
Posted by danstips in Communications, Configuration, HART, Troubleshooting on November 4, 2015
Written by: Dan Weise
I couldn’t communicate with a HART device. The configuration software I was using, Pactware, thought the USB HART modem was on COM 3, while Windows’ Device Manager showed it was actually on COM 6.
To change the COM port in Pactware to COM 6, I right clicked COM 3 and selected Parameter:
Why won’t Pactware work with the Siemens LUT 400?
Posted by danstips in Configuration, Flow, Flowmeters, Level, Level Technology, Siemens, Software, Troubleshooting, Ultrasonic, Ultrasonic Flowmeters, Wireless, WirelessHART on October 22, 2015
Written by: Dan Weise
I’ve used Pactware for a couple years now, so I was surprised when I couldn’t get the Siemens LUT400 to work with the software. The LUT400 ultrasonic level and flow controller comes with a DTM file that I installed before opening the Pactware software.
The DTM file can be downloaded from this link: http://tinyurl.com/cqk2cky
Once it had been installed, I opened Pactware and updated the device catalog, as seen in the picture below:
But when I attempted to establish a HART connection to the LUT400, I got an error message:
Troubleshooting Maxon Shutoff Valves by Sound
Posted by danstips in Honeywell, Safety Control, Troubleshooting on October 15, 2015
Written by: A.J. Piskor
One of the key pieces of any combustion system are the safety shutoff valves. Their job is important, stop the fuel from entering the system when requested or when a fault is detected. With the harsh operating environments and demanding cycling that these valves sometimes go through, internal components have been known to fail. Not only does this bring the shutoff valve down (to a safe position), but it also brings down the combustion system with it.
Maxon shutoff valves are known for their performance, reliability, and durability. In the rare case that one of their automatic reset gas valves (Series 5000/SMA11 or 5000CP/CMA11 for normally closed models, series STOA/SMA21 or STOACP/CMA21 for normally open models) fails to perform, it’s possible that one of the internal components could have gone bad. Each Maxon automatic reset shutoff valve comes with three critical electrical components (solenoid, motor, position switch) that need to work together for the valve to operate properly. By listening to the valve cycle to its energized state, you can detect if any of these critical electrical components needs to be replaced.
Lesman Tech Tips 