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

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6 F 3 B 0 3 5 6

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
	(EEPROM) check	possible but message transmission is
		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
	(jabber timer) check	power off/on (SN325, T2N) or pressing
		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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Contents T2N/T3H stations Important Information Preface Contents System configuration Introduction to S20LP∙ Overview Station hardwareT2N include of S20LP Port SN325 SN325S20LP port for T2N PU245N ∙ Status LEDsFor SN325 ∙ Reset switch only SN325 ∙ Station number setting switches∙ Transmission cable connectors ∙ Loader portLS overview Menu⎯ 10 ⎯ S20LP system specifications SpecificationsS20LP-station specifications Scan transmission overview Setting the data send block by S-LS Allocation and network assignment by T-PDSStation number setting Setting for data linkageSettings on T-PDS Link PDS screen example Block Send Receive ⎯ 18 ⎯ Global ⎯ 20 ⎯ Settings on S-LS ⎯ 22 ⎯ ⎯ 23 ⎯ ⎯ 24 ⎯ ∙ Scan Transmission ∙ Scan Access∙ Start with Standby mode ∙ Message Transmission∙ Target Scan Time Data linkage example ∙ Settings on T-PDS Setting on S-LS LS setting screen 2 for STN #2 Cable connections ∙ Station down RAS functionBehavior in trouble ∙ Transmission cable breakageAt initialization at power on Self-diagnostic functionDuring operation SN325 LED indicationT2N RAS information monitored in T2N/T3H Station status Online mapStandby map Loop map Only T2NRAS information monitored on S-LS Number 1-64 on the screen shows the Station numberSelf Station Station No.01 Offline Select the Station Number Click the Status Display Possible error message are as follows Station down informationInstruction format Instruction SpecificationExpanded data transfer instruction FunctionParameter and construction Transfer parameter tableSample program ∙ OperationRemarks Computer link protocol Message transmissionMessage transmission PC link protocol∙ Send Transfer parameters a CMDStatus B TermSTS Status Meaning Detailed Information Send completion status PC link protocol transmission Data write Transfer parametersRID Status See 7.3 5 for details on bits C, D, E, and F Important itemsXW/YW PC link protocol transmission Data read ⎯ 57 ⎯ SW067 Write enabled PC link protocol transmission program RemarksLength END Appendix Scan cycle⎯ 63 ⎯ PDS remote programming PDS Setup options screen