Toshiba S20LP Self-diagnostic function, At initialization at power on, During operation

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5.2 Self-diagnostic function

The S20LP-station has the following self-diagnostic function.

∙	At initialization (at power on)
	Diagnostic item	Station operation abnormal
	ROM BCC check	Station moves into Down mode.
	RAM read/write check	Communications with other stations are
	CPU and peripheral LSI check	not possible. This state will be reset by
	Station number check	power off/on (SN325, T2N) or pressing
		Reset switch (SN325).
	Transmission parameter	Station moves into Standby mode. In
	(EEPROM) check	this state, scan transmission is not
		possible but message transmission is
		available. Station waits for transmission
		parameter setting.

∙	During operation
	Diagnostic item	Station operation abnormal
	Watch dog timer check	Station moves into Down mode.
	Abnormal timer check	Communications with other stations are
	(jabber timer) check	not possible. This state will be reset by
		power off/on (SN325, T2N) or pressing
		Reset switch (SN325).
	Receive frame check (CRC check)	Station ignores the abnormal frame.
	Response check	In message transmission, if response
		from the target station cannot be
		received, station re-sends the frame.
	No signal state check	If no signal state continues more than
		specified time, station starts re-
		configuration operation.

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