From: Jennifer Cline
Sent: Fri Jun 19 16:40:42 2015
To: Jason Clifford
Subject: FW: Molalla WWTP - VFD communications
Importance: Normal
Attachments: image001.jpg; WWTP VFD wiring.pdf; image003.png; Hi Jason, Have you received a quote from GPEC? I’m working on the quote with Troy to make this happen as soon as we can. Jennifer Cline, P.E. City of Molalla Public Works Director O: 503.759.0218 F: 503.829.3676 From: Troy Collison [mailto:tbc@industrialsystems-inc.com] Sent: Friday, June 19, 2015 11:02 AM To: Jennifer Cline Cc: John Sowards; Mark Lietzke; Jason Clifford; Dan Huff Subject: RE: Molalla WWTP - VFD communications Hi Jennifer Please see attached quote. The analog output modules are currently quoted as 3 to 4 weeks lead time. We are working to find some in stock at another distributor and I am confident we will be able to. Thanks you Troy B. Collison 5835 NE 122nd Avenue, Suite #110 Portland, Oregon 97230 http://www.industrialsystems-inc.com Phone: 503.262.0367 Cell: 360.957.5039 Fax: 503.262.0371 CCB # 196597 WA #INDUSSI880K9 AK# 1018436 From: Jennifer Cline [mailto:jcline@cityofmolalla.com] Sent: Thursday, June 18, 2015 5:00 PM To: Troy Collison Cc: John Sowards; Mark Lietzke; Jason Clifford; Dan Huff Subject: RE: Molalla WWTP - VFD communications Hi Troy, Will you please provide a quote to move forward with the following: (1) create a hardwired interconnect diagrams to connect the VFD’s directly to PLC I/O (2) work with GPEC to install the wiring and modify the VFD and PLC programming to accommodate for the change. Jason is working hard to keep the TPS running, we would like to expedite this as soon as possible. Regards, Jennifer Cline, P.E. City of Molalla Public Works Director O: 503.759.0218 F: 503.829.3676 From: Troy Collison [mailto:tbc@industrialsystems-inc.com] Sent: Wednesday, June 17, 2015 10:20 AM To: Jason Clifford Cc: Jennifer Cline; John Sowards; Mark Lietzke Subject: Molalla WWTP - VFD communications Hi Jason, As discussed on Monday, I wanted to take a few minutes to outline a recurring problem with the VFD’s that operate both the transfer pumps and the effluent pumps at your facility. All three transfer pumps and both effluent pumps use fuji variable speed drives (VFD’s) that are relabeled as a GE product. These drives are controlled by the PLC system via GE’s GENIUS communications protocol using a 3rd party communications module manufactured by Horner Electric. We first started noting the VFD’s faulting due to a problem with the options module (the Horner communication module) several months ago. Mark Lietzke from our office had mentioned to the operators at the WWTP at that time, that an alternative way of controlling the VFD’s may need be implemented but the problem appeared to go away so nothing was done. The issue has returned however and appears to be here to stay. We would normally just install a new communication module in a case like this however GE has abandoned the GENIUS protocol and the modules by Horner are no longer available. We can attempt to locate 2nd hand or secondary market modules if you like us to. Or, we can crate hardwired interconnect diagrams to connect the VFD’s directly to PLC I/O and then work with your electrician to install the wiring and modify the VFD and PLC programming to accommodate this change. A third option would be to replace the VFD’s but that will be very expensive and should be discussed internally and budgeted for well in advance. I would like to know if you agree with our preferred approach to this problem of moving the VFD control off Genius and to hardwired connections. If so, we will prepare the needed schematics and work on the programming while guiding your electrician to install the needed wiring. Please let us know how you would like to proceed. Thanks! Troy B. Collison 5835 NE 122nd Avenue, Suite #110 Portland, Oregon 97230 http://www.industrialsystems-inc.com Phone: 503.262.0367 Cell: 360.957.5039 Fax: 503.262.0371 CCB # 196597 WA #INDUSSI880K9 AK# 1018436