36 Discrete I/O Modules
Publication 1746-IN005A-US-P
Figure 5:JP1 in Processor Fault Notification Position
For additional information on processor fault codes and user fault routines refer
to the following user manuals:
• Your programming device’s reference manual
• HHT User Manual, publication 1747-NP002:
Chapter 28, Troubleshooting Faults
Chapter 29, Understanding the Fault Routine
Table 21 defines operation of all SLC 500 processors in the case of a blown fuse
in a 1746-OBP16, -OVP16 and -OAP12:
Table 21:Processor Operation After A Blown Fuse (1746-OBP16, -OVP16 and
-OAP12)
IMPORTANT: When using SLC 5/02 and higher processors, a User Fault Routine
cannot be used to clear the major fault bit.
!
ATTENTION: For 1746-OBP16/-OVP16, all outputs on the
module are OFF if the fuse blows. For 1746-OAP12, all outputs
on the same common as the blown fuse are OFF. If processor
operation is allowed to continue after a blown fuse, extreme care
should be taken to ensure the safety of personnel and guard
against equipment damage.
JP1 Set to
Processor Continues
JP1 Set to
Processor Faults
JP1 is in processor Fault Position
Processor is notified when fuse i
blown.
JP1
2
3
JP1
1
1
2
3
1746-OBP16 and -
1746-
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