A client of ours recently requested us to look into an old compressor control panel using an AB SLC500/02 with the view to building in redundancy. The AB PLC sits in an old panel beside a Mitsubishi FX2-128MR PLC.
The Client also requires that the same compressor sends back status information to the control room which is basically a Honeywell DCS system. My first thought is - why not extend the honeywell system to the compressor unit and viola - redundancy finished. Potential difficulty for the client is the cost from Honeywell - they charge an arm and a leg to walk on site.
What I have been looking at in order to build a budget price is to hook up to the honeywell system via modbus. In order to do so I was considering the Contrologix redundancy in the control room with a Flexlogix option in the compressor panel. The option to elimanate the Mitsubishi PLC and integrate it to the new design would also help O&M. The Client has indicated 2 other compressors in the same area that they will want to integrate later and my idea was to extend the controllogix bus out to both of these panels on this new design.
Has anybody any recommendations on my considered design. AB is not a requirement but I just considerded it as the client is currently using a product line. As the SLC500 doesnt offer redundancy (correct me if Im wrong), it effectively is to be replaced.
Happy new year to all,
AC
The Client also requires that the same compressor sends back status information to the control room which is basically a Honeywell DCS system. My first thought is - why not extend the honeywell system to the compressor unit and viola - redundancy finished. Potential difficulty for the client is the cost from Honeywell - they charge an arm and a leg to walk on site.
What I have been looking at in order to build a budget price is to hook up to the honeywell system via modbus. In order to do so I was considering the Contrologix redundancy in the control room with a Flexlogix option in the compressor panel. The option to elimanate the Mitsubishi PLC and integrate it to the new design would also help O&M. The Client has indicated 2 other compressors in the same area that they will want to integrate later and my idea was to extend the controllogix bus out to both of these panels on this new design.
Has anybody any recommendations on my considered design. AB is not a requirement but I just considerded it as the client is currently using a product line. As the SLC500 doesnt offer redundancy (correct me if Im wrong), it effectively is to be replaced.
Happy new year to all,
AC