If you're curious about or thinking about a PLC career, follow together with each day on the project. What they are called happen to be transformed plus some particulars transformed to guard security.
"Yes boss, we're still identifying the issue using the damper control around the exhaust." "We tracked our electrical connections yesterday, that's not the issue.Inch "The electrical installer has explained the damper actuator includes a small panel with switches and Brought indications." Its difficult to read (he's about 15 ft in mid-air putting on a security harness connected to some gantry crane).
I must get more information around the actuator, and so i leave your building and mind to my laptop. It's occasions such as these after i fully appreciate the simplicity of hooking up to the web and also the accessibility to the documents on producers websites. To the damper, I tell you the setup procedure using the electrical installer but he's getting some difficulty programming the actuator because of the flexing pcb and him worrying about breaking it.
"Okay men the wiring is nice and also the actuator setup is performed, however it still does not move...maybe it's jammed." So when they make a start on that, I take a look at a few of the I/O while online using the PLC. The temperature and humidity still looked good therefore the new sensors seem to be working. I'd scaly the analog inputs while using manufacturer data within the PLC modules instead of within the PLC's program. Using the analog output I merely scaly -100% towards the 4ma to 20ma output. That's how a program was written and far simpler to connect with when you are programming. For example, say I want a valve half open, 50% or 12ma that is simpler?
I am unable to move ahead until we release that damper, and so i wake up to visit have a look, go out work and switch back around. I didn't remember my hardhat. Yes, much more the area or around the manufacturing floor safety gear is needed and lots of companies go very seriously permanently reason. Consider safety included in a PLC career. Back in the building, they've the coupling apart and should not move it. "So it's jammed!" It's a new system and suspected the chance last, If only we demonstrated its movement first.
A sizable pipe wrench frees the damper. I go back to the PLC, command the actuator to rotate to ensure it works before we bolt everything together ...this issue ended up costing several hrs of troubleshooting, dis- set up, repair and reassembly! So goes commissioning!
I verify the position feedback for that exhaust damper is working (it's another 4-20ma input scaly to -100%) It is crucial this damper is proven open before we command the blower on. The 60 hewlett packard blower can over pressurize the system's design when the damper is closed. I command the blower on...but within the radio the electrical installer states, "It isn't running!" What now? I'm worried that this can be another several hour ordeal. Fortunately it had been just in OFF mode within the MCC and also at the neighborhood explosion proof disconnect switch. Whew! I dislike missing the dates to finish and therefore needing to travel to the website again. A PLC career will most likely require travel, less so, in case your jobs are inside a manufacturing facility where you stand based.
No comments:
Post a Comment