I am hoping that someone with more experience might be able to help me. We are currently in the process of upgrading one of our manufacturing facilities. We have a very old GE Fanuc Field Control system in place that utilizes a 90-30 PLC as the main controller. We have the Genius bus run through conduit from one BIU to the next. This actually goes into three separate manufacturing rooms.
We would like to strip the system out of one of the rooms so that new sheet rock can be installed. All of the I/O has been disconnected, but the field stations are still in place as we have automation in other rooms that is still hooked into the system. I have found the BIU with the terminating resistor at the start of the loop and would like to strip out this BIU along with the four units following it.
I worked on this years ago and know that it can be tricky. We have the old hand held configuration unit, but it barely holds a charge. Would anyone know if this could be as simple as powering the whole system down, disconnecting the BIU's that are no longer needed and moving the terminating resistor to the next BIU that we want to keep active. Then powering the system back on changing the I/O configuration in the 90-30 CPU? I am also curious to know if the BIU has already been configured with the handheld programmer, does it retain all the information if the BIU next in line has been removed?
Keep in mind this is not a critical application, no harm will come if the whole system goes down for a day. I am just hoping to avoid a really late night. The attached work document shows a picture of the field unit and the last unit in line that has the terminating resistor in place.
Any help would be greatly appreciated.
We would like to strip the system out of one of the rooms so that new sheet rock can be installed. All of the I/O has been disconnected, but the field stations are still in place as we have automation in other rooms that is still hooked into the system. I have found the BIU with the terminating resistor at the start of the loop and would like to strip out this BIU along with the four units following it.
I worked on this years ago and know that it can be tricky. We have the old hand held configuration unit, but it barely holds a charge. Would anyone know if this could be as simple as powering the whole system down, disconnecting the BIU's that are no longer needed and moving the terminating resistor to the next BIU that we want to keep active. Then powering the system back on changing the I/O configuration in the 90-30 CPU? I am also curious to know if the BIU has already been configured with the handheld programmer, does it retain all the information if the BIU next in line has been removed?
Keep in mind this is not a critical application, no harm will come if the whole system goes down for a day. I am just hoping to avoid a really late night. The attached work document shows a picture of the field unit and the last unit in line that has the terminating resistor in place.
Any help would be greatly appreciated.