Toshiba S20LP instruction manual ⎯ 63 ⎯

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6 F 3 B 0 3 5 6

Actual transmission cycle time (TCY) is sum of above TSCN and TMSG. But when TSCN is short, Time for software operation (TSOFT) is not neglected. Therefore, Actual transmission cycle time is expressed as follows.

If TSOFT < TSCN / 2

TCY = TSCN + TMSG

If TSOFT > TSCN / 2

TCY = TSCN / 2 + TSOFT + TMSG

TSOFT = ( 370 * NSTN + 2.8 * WSCN ) / 1000 [ms]

Set the Target Scan Time (Target Cycle Time) larger than above TCY.

Here;

NSTN: Number of connected stations

WSCN: Total size of send data (words)

WMSG: Maximum message size of send data (words)

MSTN: Number of message transmission stations

(Note 1) The minimum TSCN is about 3 ms. Even if the above calculation result is less than 3 ms, actual TSCN is limited by this value.

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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 ∙ Station number setting switches ∙ Transmission cable connectors∙ Reset switch only SN325 ∙ 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 Access ∙ Start with Standby mode∙ 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 RAS function Behavior in trouble∙ Station down ∙ 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 Specification Expanded data transfer instructionInstruction format FunctionParameter and construction Transfer parameter tableSample program ∙ OperationRemarks Message transmission Message transmissionComputer link protocol 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 Remarks Length END Appendix Scan cycle⎯ 63 ⎯ PDS remote programming PDS Setup options screen