IBM 3278 Series Maintenance Information page 116

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3.3.2.3 Test 1, Error Log Display
From the last time that control unit power was turned on, all errors sensed by the control unit were recorded in the error log.
When control unit power is turned off, the error log is erased. The error log for any terminal attached to the control unit can
be displayed by requesting online test 1. The following error log formats are displayed at the requesting display station:
3274 Error Log
Line, ~TY1
Displays the most current low-order digits of the 200, 300,400, and 500
Coax port address 00-31 / series nnn numbers, 200 leftmost to 500 rightmost.
Line 2 22 33 445 5
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Displays the statistical-counter information associated with this device.
Line 3 XXXX XXXX XXXX
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TTount of feature errors since last power on.
Cou nt of bad status received from the base since last power on.
Number of device checks (buffer parity errors) since last power on.
Not applicable.
Number of coax parity errors since last power on.
Number of coax timeouts since last power on.
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