Toshiba T2N instruction manual Down Information Error code H Interpretation

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7.2 Down Information

When an Ethernet Port goes to down mode, the factor that caused that transition is stored in the T2N interface buffer as one word of data. This data can be read by the T2N with the READ instruction.

Table 7.1 lists the down information error codes and the factors that caused the transition to down mode.

Table 7.1 Down Information

Error code (H)	Interpretation
0010	Watchdog timeout
0020	Memory bus stall
0030	A TRAP occurred
0040	Jabbering timeout
0050	LAN controller check error
0160	ROM BCC check data match error
0260	System RAM area check error
0360	T2N interface buffer check error
0500, 0501	Semaphore acquisition error
0502, 0503	Semaphore acquisition error
0504	MBX receive error
0505	MBX send error
0506	TCP resend queue full
0507	Acquired buffer in use
0508	Error in acquiring initial buffer

Important items

This is a read-only area. Do not write to this area with the WRITE instruction. Subsequent reads will not return correct down information.

Sample: Down information readout

R0000

1- --[04081 MOV RW010][00001 MOV RW011][H00FE READ RW010 -> D1000]--

READ instruction description

H00FE: Module designation ... Ethernet Port must specify H00FE.

RW010: Specifies the 04081 (0FF1H) down information area. 0FF1H is the down information area for the Ethernet Port.

RW011: Specifies the number of words (00001) to be read out.

D1000: Specifies the register in which to store the read out down information.

In this case, the down information that is read out is stored in D1000.

The down information is stored in D1000 by turning R0000 on.

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