Hello All! I have a sneaky issue that I really need some help with. We have a DL405 PLC and a EA9-T12CL HMI. The PLC was programmed with a Fault Code tag - V2000 and it is filled with values from K1-K600. The HMI has a Lookup Text that uses these codes and translates them to the proper error...
I'm hurting here and really need help.
I have an old machine running a AutomationDirect PLC 405. I have a data collection system that is successfully gathering data from this PLC, and from the KEPWare OPC Server I have been able to gleam from the KEP tags the various PLC Memory addresses. Many...
Not sure if this is the best place for this, but I have an electromagnetic application where we are driving 2 coils with 0.2-2.0 amps with TDK Lambda power supplies. The application requires reversing polarity of the current and this is where we are using the ice cube relay. It is critical...
I recently started a new position with a new employer - large factory - complicated product. We have an old-time automation engineer that is a 'Think and Do' only kind of guy (We also have a lot of Labview being done here). I would like to learn Think and Do so I can help him bring some of his...
I have a flat plate (~16in^2) that has enough heat input to get upwards of 500°C during processing. I have been asked to look into cooling it with LN2. I don't even know where to begin. Some of my questions are:
How do I provide a specific flow rate of LN2 at pressure to cool surface?
What...
Hello! I have a process I am trying to control and need to cool a round, flat plate - localized temperatures can get as high as 500°C. We currently use a fixture that has cooling water flowing through it, but we believe that as the plate that needs to be cooled gets hot, deformation occurs and...
I am trying to convert an Allen Bradley RSL5k program and am stuck on an addressing issue. In AB I have a UDT with a DINT member. I step through the bits of the DINT programatically with the following code
UDT_NAME.MemberDINT.[StepVar] and then I simply cycle through the applicable bits of...
We have a product that removes debris from raw sewage. Essentially it is a drum screen enclosed in a large, enclosed tank. The tank has covers to help contain the nasty sewer gases, liquids and wash spray that will be present as part of the process. In the past the drive motor ~1HP, 3phase...
We have a new job where we will be providing a hoist type of equipment - that typically travels back and forth on a monorail. However, this particular job we are mounting that monorail, or better stated, that monorail will be part of the Bridge of a bridge crane. Typically, for positioning and...
Known:
Class 1, Division 1, Group C & D environment
5 HP Induction Motor with a impeller type blade attached.
Local (at motor)Disconnect.
Blade can be accessed before motor comes to a stop.
In a non-hazardous environment we typically supply a solenoid to latch the access till motor spins down...
Due to an unfortunate turn of events, my previous post was deleted. This is an attempt to repeat. Please contribute. I have been working as an Engineering Professional since June 2003. I have worked in Mechanical Design as well as Electrical Controls. No this isn't an resume.
I am in...
In the past I have always installed all of my AB software (I use both RSL500 & 5K) in, and ran on a Virtual machine, specifically VMWare. However, with the release of Studio 5000 I am wondering if I shouldn't forget the Virtual Machine (VM has changed their free license to non-commercial use...
I work in the Wastewater industry and we are often designing controls for such environments. I was talking to a fellow Controls Engineer and he made a comment I don't know if I agree with. We often run full voltage wiring out to the hazardous area in permanent conduit to a junction box then...
We have a 480VAC 3 phase, 1/2 HP motor that has failed in a very short period of time. The bearing are making a lot of noise. The site is telling us that the motor current is within the normal range. We don't think it is gear drive to which it is connected. My question. I have been putting...
This may be a remedial question, but I can never seem to find exactly what I am looking for in the NEC.
I have a control panel that has the main 480VAC power feed into a breaker - (ABB Tmax) Power then branches into three motors and a transformer. Each motor and transformer is protected per...
Hello,
I am not a EE, ME working as a controls engineer learning lots and enjoying it, but I have been stumped. I have a job - still waiting to find out if it supply is WYE or Delta 480 3 phase - don't know if that matters. Another vendor is supplying a 230VAC single phase pump motor that I...
This is almost embarrasing that I have to ask this question, but alas, mental block isn't going away.
I have a remote input that turns on a relay, that subsequently turns on a Cycle Timer, On-Off-On-Off, etc. until the remote input shuts off. I am trying to figure out how to get the equipment...
Let me preface with the fact that I have an MS in Mechanical (run away) but have seen the light and am converting to the controls world. Long story.
The control panels I design often control multiple motors (branch circuit) and as such I need to provide fuses/breakers on each branch. We...
I would like to connect a Micrologix 1400 PLC to a Yaskawa V1000 via Ethernet/IP and control the VFD from the PLC. Has anyone out there done this? Would you be willing to share and example of how to setup and establish communications? Please - I know it will involve messaging, but am not sure...
I have an application where we usually have our control panel within a short distance (<100 feet) of the motors it will be running. It is a hoist application where we have festoon cable that runs from a fixed junction box to the traversing hoist motors. From the junction box to the panel we...
