| 0x0 | 0 | 0x98110000 | ERR_NOERROR | No error |
| 0x1 | 1 | 0x98110001 | ERR_INTERNAL | Internal error |
| 0x2 | 2 | 0x98110002 | ERR_NORTIME | No real time |
| 0x4 | 4 | 0x98110004 | ERR_INSERTMAILBOX | Mailbox full – the ADS message could not be sent. Reducing the number of ADS messages per cycle will help |
| 0x3 | 3 | 0x98110003 | ERR_ALLOCLOCKEDMEM | Allocation locked – memory error |
| 0x5 | 5 | 0x98110005 | ERR_WRONGRECEIVEHMSG | Wrong HMSG |
| 0x6 | 6 | 0x98110006 | ERR_TARGETPORTNOTFOUND | Target port not found – ADS server is not started or is not reachable |
| 0x7 | 7 | 0x98110007 | ERR_TARGETMACHINENOTFOUND | Target computer not found – AMS route was not found |
| 0x8 | 8 | 0x98110008 | ERR_UNKNOWNCMDID | Unknown command ID |
| 0x9 | 9 | 0x98110009 | ERR_BADTASKID | Invalid task ID |
| 0xA | 10 | 0x9811000A | ERR_NOIO | No IO |
| 0xB | 11 | 0x9811000B | ERR_UNKNOWNAMSCMD | Unknown AMS command |
| 0xC | 12 | 0x9811000C | ERR_WIN32ERROR | Win32 error |
| 0xD | 13 | 0x9811000D | ERR_PORTNOTCONNECTED | Port not connected |
| 0xE | 14 | 0x9811000E | ERR_INVALIDAMSLENGTH | Invalid AMS length |
| 0xF | 15 | 0x9811000F | ERR_INVALIDAMSNETID | Invalid AMS Net ID |
| 0x10 | 16 | 0x98110010 | ERR_LOWINSTLEVEL | Installation level is too low –TwinCAT 2 license error |
| 0x11 | 17 | 0x98110011 | ERR_NODEBUGINTAVAILABLE | No debugging available |
| 0x12 | 18 | 0x98110012 | ERR_PORTDISABLED | Port disabled – TwinCAT system service not started |
| 0x13 | 19 | 0x98110013 | ERR_PORTALREADYCONNECTED | Port already connected |
| 0x14 | 20 | 0x98110014 | ERR_AMSSYNC_W32ERROR | AMS Sync Win32 error |
| 0x15 | 21 | 0x98110015 | ERR_AMSSYNC_TIMEOUT | AMS Sync Timeout |
| 0x16 | 22 | 0x98110016 | ERR_AMSSYNC_AMSERROR | AMS Sync error |
| 0x17 | 23 | 0x98110017 | ERR_AMSSYNC_NOINDEXINMAP | No index map for AMS Sync available |
| 0x18 | 24 | 0x98110018 | ERR_INVALIDAMSPORT | Invalid AMS port |
| 0x19 | 25 | 0x98110019 | ERR_NOMEMORY | No memory |
| 0x1A | 26 | 0x9811001A | ERR_TCPSEND | TCP send error |
| 0x1B | 27 | 0x9811001B | ERR_HOSTUNREACHABLE | Host unreachable |
| 0x1C | 28 | 0x9811001C | ERR_INVALIDAMSFRAGMENT | Invalid AMS fragment |
| 0x1D | 29 | 0x9811001D | ERR_TLSSEND | TLS send error – secure ADS connection failed |
| 0x1E | 30 | 0x9811001E | ERR_ACCESSDENIED | Access denied – secure ADS access denied. |