12-21
12.1.3 Table of Spe cial Data Registers for FPΣ
The special data registers are one word (16-bit) memory areas which store specific information.
(A: Available, N/A: Not available)
Register
No.
Name Descriptions
Read
-ing
Writ-
ing
DT90000
Self-diagnostic error
code
The self-diagnostic error code is stored here
when a self-diagnostic error occurs.
AN/A
DT90001 Not used N/A N/A
When an error occurs at FPΣ expansion I/O
unit, the bit corresponding to the unit No. will
be set on “1”. Monitor using binary display.
DT90002
Position of abnormal
I/O unit for FPΣ left
side expansion
AN/A
DT90003 Not used N/A N/A
DT90004 Not used N/A N/A
DT90005 Not used N/A N/A
When an error condition is detected in an
intelligent unit, the bit corresponding to the unit
No. will turn on . Monitor using binary display.
DT90006
Position of abnormal
intelligent unit for FPΣ
left side expansion
AN/A
DT90007 Not used N/A N/A
DT90008 Not used N/A N/A
DT90009
Communication error
flag for COM2
Stores the error contents when using COM2
port.
AN/A
When the state of installation of FP0
expansion I/O unit has changed since the
power was turned on, the bit corresponding to
the unit No. will turn on. Monitor using binary
display.
DT90010
Position of I/O verify
error unit for FP0 right
side expansion
AN/A
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