TROUBLESHOOTING
INTRODUCTION
5 - 2
I-E96-624A
®
Status Bytes
Five status bytes provide information about Plant Loop to Plant
Loop Transfer Module status. These bytes are available
through any operator interface such as the Operator Interface
Station (OIS). Refer to the instruction for your operator inter-
face for an explanation of how to access status bytes. Table
lists the status bytes. Table
lists the status byte
definitions.
0 0 1 1 0 1 0 1
Microprocessor received spurious excep-
tion vector.
Reset the PPT.
0 0 1 1 0 1 1 0
A divide by 0 or CHK instruction was
expected.
Reset the PPT.
0 0 1 1 0 1 1 1
TRAP instruction was executed.
None.
0 0 1 1 1 1 1 1
The PPT has stopped because the user
pressed the Stop pushbutton.
Reset the PPT.
0 0 0 0 0 0 0 0
1
The secondary PPT configuration is not
copied from the primary PPT yet.
None.
1 0 0 0 0 0 0 0
1
The secondary PPT correctly copied the pri-
mary configuration and is ready to take
over.
None.
1. These codes apply to the secondary PPT in a redundant configuration.
Table 5-1. Table 5-1. PPT Error Codes
(continued)
LED
8 7 6 5 4 3 2 1
Meaning
Corrective Action
Table 5-2. Status Bytes
Byte
Bit+
7
6
5
4
3
2
1
0
1
ES
MODE
TYPE
2
FTX
BAC
RIO
LIO
N/A
NVI
CFG
N/A
3
PCU
MEM
NEF
N/A
N/A
N/A
N/A
N/A
4
LIE
LRE
LRE
LTE
LTE
N/A
N/A
N/A
5
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A