Toshiba S20LP RAS function, Behavior in trouble, ∙ Station down, ∙ Transmission cable breakage

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6 F 3 B 0 3 5 6

5. RAS function

5.1Behavior in trouble

(1)Optical fiber system

∙Station down

If a station (either main, back-up or general) becomes down, the abnormal station will be disconnected from the S20LP system (re-configuration), then communications of remaining stations will be re-started. If two station (either main, back-up or general terminals) become power off, the S20LP system will split into two independent S20LP systems at the power off stations.

S20LP loop No.1

Power off

S20LP

STN #1

OTR2 OTR1

OTR1 OTR2

S20LP

STN #6

Power off

OTR1 OTR2

OTR2 OTR1

OTR1 OTR2

OTR2 OTR1

S20LP STN #2

S20LP STN #5

OTR1 OTR2

OTR2 OTR1

OTR1 OTR2

OTR2 OTR1

S20LP

STN #3

OTR2 OTR1

OTR1 OTR2

S20LP

STN #4

S20LP loop No.2

∙Transmission cable breakage

If both transmitter and receiver lines are broken (*1) or if one of the two lines is broken (*2), the S20LP system will cut off the broken lines.

OTR2

To S20LP STN #n

OTR1

S20LP STN #m

Broken lines

OTR1 OTR2

OTR2

OTR1

(*1)

(*2)

S20LP STN #l

OTR1

To S20LP STN #o

OTR2

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Contents T2N/T3H stations Important Information Preface Contents Introduction to S20LP System configurationStation hardware ∙ OverviewT2N include of S20LP Port SN325 SN325∙ Status LEDs S20LP port for T2N PU245NFor SN325 ∙ Transmission cable connectors ∙ Station number setting switches∙ Reset switch only SN325 ∙ Loader portMenu LS overview⎯ 10 ⎯ Specifications S20LP system specificationsS20LP-station specifications Scan transmission overview Allocation and network assignment by T-PDS Setting the data send block by S-LSSetting for data linkage Station number settingSettings on T-PDS Link PDS screen example Block Send Receive ⎯ 18 ⎯ Global ⎯ 20 ⎯ Settings on S-LS ⎯ 22 ⎯ ⎯ 23 ⎯ ⎯ 24 ⎯ ∙ Start with Standby mode ∙ Scan Access∙ Scan Transmission ∙ 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 Behavior in trouble RAS function∙ Station down ∙ Transmission cable breakageSelf-diagnostic function At initialization at power onDuring operation LED indication SN325T2N RAS information monitored in T2N/T3H Online map Station statusLoop map Only T2N Standby mapNumber 1-64 on the screen shows the Station number RAS information monitored on S-LSSelf Station Station No.01 Offline Select the Station Number Click the Status Display Station down information Possible error message are as followsExpanded data transfer instruction Instruction SpecificationInstruction format FunctionTransfer parameter table Parameter and construction∙ Operation Sample programRemarks Message transmission Message transmissionComputer link protocol PC link protocol∙ Send CMD Transfer parameters aStatus B TermSTS Status Meaning Detailed Information Send completion status Transfer parameters PC link protocol transmission Data writeRID Important items Status See 7.3 5 for details on bits C, D, E, and FXW/YW PC link protocol transmission Data read ⎯ 57 ⎯ SW067 Write enabled Remarks PC link protocol transmission programLength END Scan cycle Appendix⎯ 63 ⎯ PDS remote programming PDS Setup options screen