---
task: Read-only checks of ACCESS Service (OPC UA server, OPC clients, ODBC server)
version: R1.03
source: IM 36K10L45-01EN §1–§3, §6, §9, §10; practiced on the test system 2026-10-01
status: verified
---

# ACCESS Service checks (read-only)

| Check | How | Test system result |
|---|---|---|
| Processes | `tasklist` → `opxuas.exe` (UA server), `opxuac.exe` (one per OPC UA line + `opxuac_mon`), `opxdas12.exe` / `opxaes.exe` (only while a client is connected), `opxdac.exe`/`opxaec.exe` (per line); `durwfp -p <name> -t 0` → 0 = attached | `opxuas`, `opxuac` (`OPXUAC_MON`) running |
| Ports | `netstat -ano` LISTENING: 34493 (OPC UA server), 1583 (ODBC), 135 (DCOM) | 34493 yes, 1583 **no** |
| Start log | `%TLS_LOG_PATH%\ci_start.log`, `umhlog.log` | `InitializeSslCtx(): SSL_CTX_use_certificate_chain_file() failed` + `Process ODBSRV exited unexpectedly` = ODBC server cannot load its certificate (ISS-008) |
| ODBC settings | `tls\sup\odbsrv.sup` (`PORT`, `USESSL`), certificate `%TLS_ROOT_PATH%\tls\pki\odbsrv\SampleServerCertificate.pem` + key | `USESSL YES`, folder missing |
| OPC UA server settings | `tls\sup\opxuas.sup`; endpoints and user tokens in `tls\exe\ServerConfig.xml` (ignore commented XML) | Endpoint `opc.tcp://[NodeName]:34493`; Basic256Sha256 / Aes128_Sha256_RsaOaep / Aes256_Sha256_RsaPss with Sign or SignAndEncrypt; anonymous, user/password, certificate tokens on |
| OPC UA certificates | `%TLS_ALLUSERS_PATH%\pki\opxuas\pkiserver\{own,trusted,rejected,issuers}`; client `…\pki\opxuac\pkiclient\{own,trusted,rejected,deleted,issuers}`; dataset `OPCUAC_PKI_CERTIFICATES_DF` | Server own `ciserveruaserver.der` |
| OPC Classic settings | `tls\sup\opxsys.sup` (tabs Alarm and Event Client, Data Access Server, Alarm & Event Server) | Defaults; `OPXAEC_SAFE_CON NO` |
| OPC UA client config | export `OPCUAC_LINE_DF`, `…_STATION_DF`, `…_SUBSCRIPTION_DF`, `…_POINT_DF` | Only the sample loopback |
| Logs | `%TLS_LOG_PATH%\OPXUAS.log`, `OpxUas_Sdk*.log`, `<UA client process>.log` | |

Fixing the ODBC server (only if ODBC is licensed and wanted; admin): place a certificate and key
with the names above in `%TLS_ROOT_PATH%\tls\pki\odbsrv\`, or set `USESSL = NO` in `odbsrv.sup`
(unencrypted ODBC traffic — a security decision), then restart CI Server.