5Ć4
b. To determine the register in the slot where the bus
error occurred, take the slot number you decode in
THIS RACK SLOT #" and decodetheleast significant
16 bits according to thetypeof modulefound in the
slot:
Any Local I/O Module*
Least Significant 16 Bits
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
BIT
REGISTER
b
A RemoteI/O Module(M/N 57C416)
Least Significant 16 Bits
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
BIT
REGISTER
b
0
0
0
REMOTE
RACK SLOT
DROP
A Network Communications Module (M/N 57C404)
Least Significant 16 Bits
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
BIT
REGISTER
b
0
0
0
DROP
The bit number being accessed may be determined from word
bit # = BYTE BIT # + (8*b)
If BYTE BIT # and 8*b = 0, address may have been accessed
as a word (integer) or bit 0 of byte 0.
* The hexadecimal number represents the Multibus
address of the error. Therefore, the standard Reliance
register number for any type of module can be decoded
from this figureand thefigurein part a. For morespecific
information, e.g., drop number, usetheapplicablefigures
that follow.
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