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6-2. How to Read Special Internal Relays(R) & Special Data Registers(DT)
78
DT9170 to DT9187(P/W Link 1 status)
Address
Description
DT9170
The P/W PC Link overlapped station number(UNIT NO.) is stored here.
DT9171
The results of the trial operation in the test mode.
[used only for P Type(Optical) Link Unit]
DT9172
Counts how many times a token is lost.
DT9173
Counts how many times two or more tokens are detected.
DT9174
Counts how many times the signal is lost.
DT9175
Counts how many times a synchronous abnormality is detected.
DT9176
Send NACK
DT9177
Send NACK
DT9178
Send WACK
P/W Link 1
DT9179
Send WACK
DT9180
Send answer
DT9181
Send answer
DT9182
Unidentified command
DT9183
Counts how many times a parity error occurred.
DT9184
End code receive error
DT9185
Format error
DT9186
Not supported error
DT9187
The self-diagnosis results