6.3.3.3.4 PnModuleStateEnumeration
| Name | Description |
| NO_MODULE_0 | For example module not plugged |
| WRONG_MODULE_1 | For example ModuleIdentNumber wrong |
| PROPER_MODULE_2 | Module is okay but at least one submodule is locked, wrong or missing |
| SUBSTITUTE_3 | Module is not the same as requested – but the IO device was able to adapt by its own knowledge |
| OK_4 | Default state |
See: [PN Protocol], Table 586 – ModuleState