Toshiba S20LP instruction manual PC link protocol transmission program, Remarks

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6 F 3 B 0 3 5 6

(8)PC link protocol transmission program

This section presents a sample program that uses PC link protocol transmission.

This program creates increment data within the local station and writes it to the remote station's registers. Next it reads out the same area and compares it with the data within the local station to check that the function succeeded.

Remarks

Make a point of understanding the content before writing programs that use the S20LP- station. The sample programs present basic examples of S20LP-station usage, and should be reviewed carefully before use in an actual system.

Sample transmission parameter construct

A A+1 A+2 A+3 A+4

A+5

A+6

A+7

2102H

CMD = 0000H

Transfer Size = 64

Register type (self-station) = 0004H

Leading address (self-station)

=1000

Register type (target-station)

=0004H

Leading address (target-station)

=1000

Response time limit = 100

Module designation. S20LP, channel 1, target station No.2 Command number: 0000H

1)Transfer register data length: 64 words

2)Local station register type code: D register

3)Local station leading address: 1000

4)Remote station register type code: D register

5)Remote station leading address: 2000

6)Response time limit: 10 seconds

Sample register construction

RW090 : Execution count designation (1 to 32767)

RW091 : Operation when a comparison error occurs (continue : 0, stop : 1)

RW092 : Transfer register data length (1 to 128 words)

RW093 : Write time transfer source register type (self-station)

RW094 : Write time transfer source leading address (self-station)

RW095 : Write time transfer destination register type / read time readout source register type (target-station)

RW096 : Write time transfer destination leading address / read time readout source leading address (target-station)

RW097 : Read time storage register type

RW098 : Read time storage register leading address

This ladder program is executed by turn on the R0520 A contact.

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Contents T2N/T3H stations Important Information Preface Contents System configuration Introduction to S20LPStation hardware ∙ OverviewT2N include of S20LP Port SN325 SN325∙ Status LEDs S20LP port for T2N PU245NFor SN325 ∙ Station number setting switches ∙ Transmission cable connectors∙ Reset switch only SN325 ∙ Loader portLS overview Menu⎯ 10 ⎯ Specifications S20LP system specificationsS20LP-station specifications Scan transmission overview Setting the data send block by S-LS Allocation and network assignment by T-PDSSetting 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 ⎯ ∙ 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 breakageSelf-diagnostic function At initialization at power onDuring operation LED indication SN325T2N 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 RemarksLength END Appendix Scan cycle⎯ 63 ⎯ PDS remote programming PDS Setup options screen