text: <s>[INST] Communication Error When disconnect off in Armor start 284GS. I installed armor start 284GS with L84ES PLC. I found today some drives shows communication error. checked 16#0002 Resource Unavailable. then checked the armor start , disconnect switch to ON. then Communication found OK. What is logic behind this? is this normal working ? or anything need to configure to avoid this type of issue. [/INST] If you turn the Local Disconnect switch to OFF position, the main line supply power is removed from the internal VFD, so that the communication fault you're encountering is an expected behavior.\n </s>