现场2组1500PLC，其中一套PLC 不时发生通讯故障 ，后面还会自动恢复。而且这个故障在工作日发生，周末基本不出现。

请教下，有谁遇到过这种情况，该怎么处理。

附 WinCC-sys .log

2303,16.06.2025,10:59:29:324,1000204,4,,PCNAME,DataManager Runtime,PLC_1001 Connection 'PLC_1001' disconnected,MSG_STATE_COME

2303,16.06.2025,10:59:32:984,1000204,4,,PCNAME,DataManager Runtime,PLC_1001 Connection 'PLC_1001' connected,MSG_STATE_GO

2303,16.06.2025,10:59:32:984,1000205,4,,PCNAME,DataManager Runtime,PLC_1001 Connection 'PLC_1001' connected,MSG_STATE_COME

及对应的 设备通道log

2025-06-16 10:59:29,324 INFO     PLC_1001(primary): SetState() new oms status=0 (old oms status=2)

2025-06-16 10:59:29,324 INFO     PLC_1001: Client received a 'logged_out' message on session: 'Session: 1'

2025-06-16 10:59:32,673 INFO     PLC_1001(primary): CloseOMPConnection()

2025-06-16 10:59:32,676 INFO     PLC_1001: Client received a 'logged_out' message on session: 'Session: 2'

2025-06-16 10:59:32,678 INFO     PLC_1001: Client received a 'logged_out' message on session: 'Session: 3'

2025-06-16 10:59:32,693 INFO     PLC_1001(primary): connecting...

2025-06-16 10:59:32,693 INFO     PLC_1001(primary): SetState() new oms status=1 (old oms status=0)

2025-06-16 10:59:32,693 INFO     PLC_1001: performing login for session: 'Session: 1'

2025-06-16 10:59:32,693 INFO     PLC_1001(primary): SetState() new oms status=0 (old oms status=1)

2025-06-16 10:59:32,756 INFO     PLC_1001: login succeeded for session: 'Session: 1', error code = 0x0000000000000000

2025-06-16 10:59:32,756 INFO     PLC_1001: legitimation not required for session: 'Session: 1' (no pwd)

2025-06-16 10:59:32,758 INFO     PLC_1001: Client received a 'logged_out' message on session: 'Session: 1'

2025-06-16 10:59:32,758 INFO     PLC_1001: performing login for session: 'Session: 1'

2025-06-16 10:59:32,821 INFO     PLC_1001: login succeeded for session: 'Session: 1', error code = 0x0000000000000000

2025-06-16 10:59:32,821 INFO     PLC_1001: legitimation not required for session: 'Session: 1' (no pwd)

2025-06-16 10:59:32,821 INFO     PLC_1001: performing login for session: 'Session: 2'

2025-06-16 10:59:32,886 INFO     PLC_1001: login succeeded for session: 'Session: 2', error code = 0x0000000000000000

2025-06-16 10:59:32,886 INFO     PLC_1001: legitimation not required for session: 'Session: 2' (no pwd)

2025-06-16 10:59:32,886 INFO     PLC_1001: performing login for session: 'Session: 3'

2025-06-16 10:59:32,953 INFO     PLC_1001: login succeeded for session: 'Session: 3', error code = 0x0000000000000000

2025-06-16 10:59:32,953 INFO     PLC_1001: legitimation not required for session: 'Session: 3' (no pwd)

2025-06-16 10:59:32,953 INFO     PLC_1001: Using 3 Session(s) 

2025-06-16 10:59:32,953 INFO     PLC_1001(primary): SetState() new oms status=2 (old oms status=0)

2025-06-16 10:59:32,953 INFO     PLC_1001: Dataaccess service successfully requested 

2025-06-16 10:59:32,953 INFO     PLC_1001(primary): connected

2025-06-16 10:59:32,953 INFO     PLC_1001(primary): connection attempt took 282 ms (hr=0x00000000)

2025-06-16 10:59:32,973 INFO     PLC_1001: ENABLEFULLTEXTS notified

2025-06-16 10:59:32,973 INFO     PLC_1001: MAX_ATTRIBUTES notified

2025-06-16 10:59:32,973 INFO     PLC_1001: MAX_SUBSCRIPTIONS_MEM notified

2025-06-16 10:59:32,973 INFO     PLC_1001: MAX_TAGS_PER_READ notified

2025-06-16 10:59:32,973 INFO     PLC_1001: MAX_SUBSCRIPTIONS notified

2025-06-16 10:59:32,973 INFO     PLC_1001: MAX_TAGS_PER_WRITE notified