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https://issues.apache.org/jira/browse/PLC4X-333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17491382#comment-17491382
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Thijs M commented on PLC4X-333:
-------------------------------
Hi Christofer,
Thank you for your quick response.
Twincat 2 is still a lot in use nowadays. A lot of companies still hesitate to
make the jump to Twincat3. So it would be nice to have a workaround.
I could take a peek in the code on how to do this, but could you point me out
in the right direction?
Thank you,
Thijs
> Multiple Items in ADS Read
> --------------------------
>
> Key: PLC4X-333
> URL: https://issues.apache.org/jira/browse/PLC4X-333
> Project: Apache PLC4X
> Issue Type: Bug
> Components: Driver-ADS
> Affects Versions: 0.10.0
> Reporter: Thijs M
> Priority: Major
>
> Hi,
> For a POC I'am testing PLC4X with ADS/AMS PLC. the PLC is a CX with twincat
> V2.11.0 (Build 2216) on it.
> So I made this test program with PLC4j (0.10.0_SNAPSHOT) to read 1 variable
> (BOOL). This seems to work fine. When I add a second variable (also BOOL)
> to the same request, I get an exception :
> Caused by: java.lang.ArrayIndexOutOfBoundsException: Index -1 out of bounds
> for length 0
> at com.github.jinahya.bit.io.ArrayByteInput.read(ArrayByteInput.java:106)
> at com.github.jinahya.bit.io.DefaultBitInput.read(DefaultBitInput.java:57)
> at
> com.github.jinahya.bit.io.AbstractBitInput.unsigned8(AbstractBitInput.java:63)
> at
> com.github.jinahya.bit.io.AbstractBitInput.unsigned16(AbstractBitInput.java:92)
> at
> com.github.jinahya.bit.io.AbstractBitInput.readInt(AbstractBitInput.java:135)
> at
> com.github.jinahya.bit.io.AbstractBitInput.readInt(AbstractBitInput.java:118)
> at
> com.github.jinahya.bit.io.AbstractBitInput.readLong(AbstractBitInput.java:156)
> at
> org.apache.plc4x.java.spi.generation.ReadBufferByteBased.readUnsignedLong(ReadBufferByteBased.java:190)
> at
> org.apache.plc4x.java.spi.generation.ReadBuffer.readUnsignedLong(ReadBuffer.java:74)
> at
> org.apache.plc4x.java.ads.protocol.AdsProtocolLogic.lambda$resolveMultipleSymbolicAddresses$65(AdsProtocolLogic.java:975)
> at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
> at
> org.apache.plc4x.java.ads.protocol.AdsProtocolLogic.lambda$resolveMultipleSymbolicAddresses$67(AdsProtocolLogic.java:972)
> at
> org.apache.plc4x.java.spi.Plc4xNettyWrapper.decode(Plc4xNettyWrapper.java:175)
> at
> io.netty.handler.codec.MessageToMessageCodec$2.decode(MessageToMessageCodec.java:81)
> at
> io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:88)
>
> Here is my code:
> String clientIp = "192.168.0.192";
> String sourceAmsNetId = "172.16.13.147.1.1";
> int sourceAmsPort = 65534;
> String targetAmsNetId = "192.168.0.184.1.1";
> int targetAmsPort = 801;
> String connectionString =
> String.format("ads:tcp://%s?sourceAmsNetId=%s&sourceAmsPort=%d&targetAmsNetId=%s&targetAmsPort=%d",
> plcIp, sourceAmsNetId, sourceAmsPort, targetAmsNetId, targetAmsPort);
> try (PlcConnection plcConnection = new
> PlcDriverManager().getConnection(connectionString)){
> if (!plcConnection.getMetadata().canSubscribe()) {
> logger.error("This connection doesn't support subscribing.");
> return;
> }
> // Send Read Request
> CompletableFuture<? extends PlcReadResponse> requestFuture =
> plcConnection.readRequestBuilder()
> .addItem("value-1", ".OPC_bAuto_:BOOL")
> .addItem("value-2", ".OPC_bAuto_2:BOOL")
> .build()
> .execute();
> PlcReadResponse response = requestFuture.get();
>
> Any help would greatly be appreciated. Thank you !
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