Section 5 Maintenance
S100 I/O Interface – CI856
3BSE 027 941 R301
137
S100 I/O Interface – CI856
Table 29. S100 I/O CI856 – Fault Finding
Fault
Possible Cause and Corrective Action
Neither R(un) nor F(ault)
LED’s are ON
The CI856 unit is in the process of being
configured. Allow time for this to finalize.
If the condition persists, and no other unit LED on
the CEX-bus is lit:
•
Check the CEX-bus fuse inside the PM8xx
processor unit
•
Initiate a reset signal (INIT) from the PM8xx
processor unit
•
Replace the CI856 unit
F(ault) LED is ON
The CI856 unit is in the process of being
restarted. Allow time for this to finalize.
Replace unit if the condition persists.
Summary of Contents for AC 800M
Page 1: ...ControlIT AC 800M Version 2 1 Controller Hardware Hardware and Operation...
Page 2: ......
Page 3: ...Controller Hardware Hardware and Operation ControlIT AC 800M Version 2 1...
Page 10: ...7DEOH RI RQWHQWV 10 3BSE 027 941 R301...
Page 20: ...Related Documentation About This Book 20 3BSE 027 941 R301...
Page 26: ...Operating Environment Safety Summary 26 3BSE 027 941 R301...
Page 42: ...Product Release History Section 1 Introduction 42 3BSE 027 941 R301...
Page 108: ...Powering from an External 24 V DC Source Section 3 Configuration 108 3BSE 027 941 R301...
Page 118: ...Verification of Redundant CPU Section 4 Operation 118 3BSE 027 941 R301...
Page 212: ...Low Voltage Directive LVD Appendix D Directive Considerations 212 3BSE 027 941 R301...
Page 214: ...Hazardous Location Approval Appendix E Standards 214 3BSE 027 941 R301...
Page 228: ...QGH 228 3BSE 027 941 R301...
Page 229: ......