SM 431, AI 8 x RTD x 16 bit, 422
Diagnostic interrupt
Channel information available, 90
External auxiliary voltage missing, 90
Front connector missing, 90
Internal error, 90
Load voltage L+ missing, 90
Module error, 90
Parameter assignment error, 90
Sensor supply missing, 90
Diagnostic messages, 89, 223
Reading, 89, 223
Diagnostics
Digital output module, 88
Diagnostics interrupt enable
Digital output module, 88
Digital input module
Diagnostics interrupt enable, 87
Load voltage L+ missing, 87
Sensor supply missing, 87
SM 421, DI 16 x UC 120/230 V, 119, 122
SM 421, DI 16 x UC 24/60 V, 112
Structure of data record 1, 397
Wire break monitoring, 87
Digital input modules
Digital module
Causes of error and remedies, 91
Channel error, 91
Channel information available, 91
Diagnostic messages, 90
External error, 91
Front connector missing, 91
Fuse blown, 92
Hardware interrupt lost, 91, 94
Internal error, 91
Internal voltage failure, 91
interrupt-triggering channels, 94
Module error, 91
Parameter assignment, 85
Parameter assignment error, 91
Sensor supply missing, 92
Digital output module
Destination CPU for interrupt, 88
Diagnostics interrupt enable, 88
Fuse blown, 88
Keep last value, 88
Index
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08
459