| OPC90 模塊 | ABB Bailey™ 模塊 | 功能代碼 | 
| AIL | Analog Output / Loop AOL | 30, 70, 158, 177 | 
| AOL | Analog Input / Loop AIL | 26, 121 | 
| BLK | General purpose block configuration and tuning | ALL | 
| DAANG | Data Acquisition Analog | 177 | 
| DADIG | Data Acquisition Digital | 211 | 
| DATA | General OPC Client Data Sharing |  | 
| DD | Device Driver | 123 | 
| DIL | Digital Output / Loop DOL | 45 | 
| DOL | Digital Input / Loop DIL | 42, 122 | 
| DEVICE | Interface Definition and operational statistics |  | 
| HAI | Harmony Analog Input | 222 | 
| HAO | Harmony Analog Output | 223 | 
| HDI | Harmony Digital Input | 224 | 
| HDO | Harmony Digital Output | 225 | 
| MODSTAT | Any Bailey™ module |  | 
| MUXCIU | Allows OPC90 to safely share its CIU with DBDOC/WinCAD/Composer | ALL | 
| MSDD | Multi-state Device Driver | 129 | 
| NISMON | Provides detailed communication loop and node diagnostic information along with loop topology. Monitors and logs potential problems. | Any Node | 
| ODD | Allows client to emulate operation of a device driver block (DD)
 | (123) | 
| OMSDD | Allows client to emulate operation of a multi-state device driver block (MSDD)
 | (129) | 
| ORCM | Allows client to emulate operation of a remote control memory block (RCM)
 | (62) | 
| ORMC | Allows client to emulate operation of a remote motor control block RMC
 | (136) | 
| ORMSC | Allows client to emulate operation of a Remote Manual Set Constant block RMSC
 | (68) | 
| OSTN | Allows client to emulate operation of a control station block STN
 | (21, 22, 23, 80) | 
| PCUMON | Monitor performance statistics for any PCU node
 | PCU | 
| POLL | Poll any block output |  | 
| RCM | Remote Control Memory | 62 | 
| RMC | Remote Motor Control | 136 | 
| RMSC | Remote Manual Set Constant | 68 | 
| SOE | Sequence of Events | 99, 243 | 
| SPEC | Predefined block specification reading and tuning | ALL | 
| STN | Station (PID Control loop) | 21, 22, 23, 80 | 
| TXT | Text | 151 | 
| TEXTSTR | ASCII String Block - TEXTSTR | 194 |