ceilingwalker
Lifetime Supporting Member
Hello. I am sure plenty of you here have been in this dilemma. I have a ControLogix PLC, PanelView Plus 400 HMI, connected to a functioning CNG system. I have nothing in the way of HMI program (other than runtime files) nor RSL5000. I have only what I was able to upload. So, I must discover I/O and understand how this system is running because I have been tasked with making some changes to both HMI as well as PLC. If this were a washing machine, I would be less apprehensive however, being a CNG system makes me very nervous and less than enthusiastic to just jump in. Could someone please give me ideas as to how I should approach this? Even in the RSL5000 I am not sure if everything there is being used. The HMI shows fan motor failures every day, even though the fan motor is running fine. According to the HMI the compressor motor isn't running, even though I know it is. I have no idea who did the retrofit on this. No one in the plant has any idea who did it either. The gentleman that used to take care of it is no longer here. I attached a copy of the .acd and it is simple however, I need to find out what the HMI is using, without being able to use my FTView-ME Studio. The PanelView is also password protected and wouldn't you know it, nobody knows the password! With the help of several people on this forum it's been decided it is clear that a start from scratch is my only available option. I was not able to open the runtime files in my Studio. I guess what I am really asking is, since I know you seasoned veteran's have probably done a lot of this, I wondered if you could tell me what process you follow, when given my particular scenario? This is to dangerous of a situation to just leap into this. Thank you all for your time.