averytc
Member
- Join Date
- Jul 2002
- Posts
- 114
![United States](https://www.plctalk.com/qanda/images/flags/United States.gif)
We have a problem that has eluded us for two months now. There is a RIO rack connected to a SLC 5/05 (upgraded from a 5/04 five years ago). It is a 13 slot rack of discrete I/O, and the only RIO node. All inputs are 1746-IA16, and all outputs are 1746-OW16. The rack controls mostly pump motors and actuated solenoid valves. This rack has been in use for over ten years with no issues.
About four months ago the rack and several cards were damaged when water came into the cabinet down the conduit from a roof leak. The rack and several I/O cards were replaced. The cabinet and roof were both sealed, and the rack functioned normally after we came back up.
Two months later, during planned downtime, we moved the cabinet directly upstairs to make room in the downstairs MCC for additional MCC sections to be installed. During the move about half of the I/O was moved to another PLC, and the cabinet was wired to UPS power instead of direct. Within days we began getting a reset, adapter decide command “AdE” on the ASB module. This causes the rack to pulse the outputs 2-3 times a second. Twice during this process a card error “L 10” & “L 4” occurred. Slot 10 is an output card, and slot 4 is an input card. Each was replaced and the error cleared. During the replacement of the input card, the power supply failed and was also replaced. The cabinet has been rewired back to its original power source, and we’ve checked grounding several times. We still however, keep getting the “AdE” problem intermittently. It seems to be related to certain combinations of inputs, but we’ve been unable to narrow it down. We have fused all of the outputs, and replaced several of the wires to the field. We are now adding surge suppression to each of the devices in the field feeding back. The ASB card and three input cards are the only things left that have not been replaced.
At this point we’re running out of things to do. Has anyone had similar issues like this before?
Thanks for your help.
Charlie
About four months ago the rack and several cards were damaged when water came into the cabinet down the conduit from a roof leak. The rack and several I/O cards were replaced. The cabinet and roof were both sealed, and the rack functioned normally after we came back up.
Two months later, during planned downtime, we moved the cabinet directly upstairs to make room in the downstairs MCC for additional MCC sections to be installed. During the move about half of the I/O was moved to another PLC, and the cabinet was wired to UPS power instead of direct. Within days we began getting a reset, adapter decide command “AdE” on the ASB module. This causes the rack to pulse the outputs 2-3 times a second. Twice during this process a card error “L 10” & “L 4” occurred. Slot 10 is an output card, and slot 4 is an input card. Each was replaced and the error cleared. During the replacement of the input card, the power supply failed and was also replaced. The cabinet has been rewired back to its original power source, and we’ve checked grounding several times. We still however, keep getting the “AdE” problem intermittently. It seems to be related to certain combinations of inputs, but we’ve been unable to narrow it down. We have fused all of the outputs, and replaced several of the wires to the field. We are now adding surge suppression to each of the devices in the field feeding back. The ASB card and three input cards are the only things left that have not been replaced.
At this point we’re running out of things to do. Has anyone had similar issues like this before?
Thanks for your help.
Charlie