Hi Iñigo, I will have to ask you to wait for a little while as you stumbled over a problem which goes a little deeper and is related to a major refactoring we did just before Christmas. I am pretty puzzled that no one ever noticed this, but I'll immediately start working on fixing this.
I'm tracking progress here: https://issues.apache.org/jira/browse/PLC4X-206 If that's done I would like to ask you to use the 0.8.0-SNAPSHOT till we've released the next version of PLC4X. Chris Am 01.07.20, 12:00 schrieb "Iñigo Angulo" <iang...@zylk.net>: Hi Chris, Thanks for the fast answer! I will keep your advice about not adding the cast to the values, and letting the driver do its work. If you want me to try to reproduce any other test just let me know. Iñigo ----------------------------------------- Iñigo Angulo ZYLK.net :: consultoría.openSource Ribera de Axpe, 11 Edificio A, modulo 201-203 48950 Erandio (Bizkaia) +34 944272119 ----------------------------------------- ----- Mensaje original ----- De: "Christofer Dutz" <christofer.d...@c-ware.de> Para: "dev" <dev@plc4x.apache.org> Enviados: Miércoles, 1 de Julio 2020 11:48:48 Asunto: Re: S7 write test doubt And let me give you a little more context ... with the INT type in S7 you happen to know that there an INT is a 16 Bit signed integer. We wanted to abstract from that. Cause another PLC could define INT as 32 bit integer ... So you can generally just work with any numeric type and pass that in. The driver will inspect the value ranges for that particular protocol and give some sensible error messages (At least it should ;-) ). But ... I just noticed that indeed I am seeing the same problems you are seeing and that my suggestion just causes a different error ... I'll get working on fixing this right away. I'm really a bit confused about this ... but it does prove that most people just care about reading ;-) Will keep you and the others posted on any progress. Chris Am 01.07.20, 11:33 schrieb "Christofer Dutz" <christofer.d...@c-ware.de>: Hi Iñigo, welcome to the party ... I really hope we'll be able to get you started asap ... I just had a look at the code and PlcInteger does have the constructor ... public PlcInteger(Short value) { super(value.intValue(), true); } So I'll try to reproduce the problem ... but for now ... could you just remove the cast from your items? builderWriter.addItem("mivariable-1", "%DB20:DBX6.7:BOOL", true); builderWriter.addItem("mivariable-4", "%DB20:DBW06.0:INT", 2); builderWriter.addItem("mivariable-2", "%DB20:DBB06:BYTE", 0); Cause PLC4X internally already ensures everything fits into the bounds and internally PLC4X handles the "(short) 2" as an "(int) 2" anyway ;-) Chris Am 01.07.20, 11:19 schrieb "Iñigo Angulo" <iang...@zylk.net>: Hi, I started doing some basic tests with the S7 protocol using a Siemens S7-300, and the latest 0.7.0 release. The tests consist of reading and writing several DB variables. I was able to read different datatypes, for instance: builder.addItem("mivariable-1", "%DB20:DBX05.0:BOOL"); builder.addItem("mivariable-4", "%DB20:DBW06:INT"); However, when I try to write the same memory addresses I only manage to write BOOL values, for example builderWriter.addItem("mivariable-1", "%DB20:DBX6.7:BOOL", true); //WORKS OK builderWriter.addItem("mivariable-4", "%DB20:DBW06.0:INT", (short)2); // FAILS builderWriter.addItem("mivariable-2", "%DB20:DBB06:BYTE", (byte)0); // FAILS I am unable to write any datatype different than BOOL. I am facing the following Error message: Exception in thread "main" org.apache.plc4x.java.api.exceptions.PlcRuntimeException: Error initializing field class PlcInteger at org.apache.plc4x.java.s7.readwrite.field.S7PlcFieldHandler.internalEncodeInteger(S7PlcFieldHandler.java:394) at org.apache.plc4x.java.s7.readwrite.field.S7PlcFieldHandler.encodeShort(S7PlcFieldHandler.java:86) at org.apache.plc4x.java.spi.messages.DefaultPlcWriteRequest$Builder.lambda$build$0(DefaultPlcWriteRequest.java:270) at java.base/java.util.TreeMap.forEach(TreeMap.java:1002) at org.apache.plc4x.java.spi.messages.DefaultPlcWriteRequest$Builder.build(DefaultPlcWriteRequest.java:265) at net.zylk.plc4x.test.protocols.WriteS7.main(WriteS7.java:102) Caused by: java.lang.NoSuchMethodException: org.apache.plc4x.java.api.value.PlcInteger.<init>([Ljava.lang.Short;) at java.base/java.lang.Class.getConstructor0(Class.java:3349) at java.base/java.lang.Class.getDeclaredConstructor(Class.java:2553) at org.apache.plc4x.java.s7.readwrite.field.S7PlcFieldHandler.internalEncodeInteger(S7PlcFieldHandler.java:392) ... 5 more Maybe I am misunderstanding the sintax and how the values should be written? --- To try to offer some more information about this error: Digging into that class (S7PlcFieldHandler) I saw that there are some fields that are initialized based on the value of the datatype case INT: minValue = BigInteger.valueOf(Short.MIN_VALUE); maxValue = BigInteger.valueOf(Short.MAX_VALUE); fieldType = PlcInteger.class; valueType = Short[].class; castedValues = new Short[values.length]; break; Then, the line that throws the Exception seems to be trying to inferr a PlcInteger class constructor based on the datatype // Create the field item. try { return fieldType.getDeclaredConstructor(valueType).newInstance(castedValues); } catch (InstantiationException | IllegalAccessException | InvocationTargetException | NoSuchMethodException e) { throw new PlcRuntimeException("Error initializing field class " + fieldType.getSimpleName(), e); } However there appears to be a "mismatch" between the valueType (Short[]) and the constructor (Short) in the PlcInteger class, which leads me to think i am missing something on the write value sintax? Thank you in advance, any help will be welcome. Iñigo ----- the test class code: public class WriteS7 { private static final Logger _log = LoggerFactory.getLogger(WriteS7.class); public static void main(String[] args) throws PlcConnectionException { String connectionString = "s7://10.105.143.1:102?remote-rack=0&remote-slot=0&controller-type=S7_300"; _log.info(String.format("Establishing connection to %s", connectionString));; try (PlcConnection plcConnection = new PlcDriverManager().getConnection(connectionString)) { _log.info("Conecting... " + connectionString); if (!plcConnection.getMetadata().canWrite()) { _log.error(String.format("Connection %s doesn't support writing.", connectionString)); return; } PlcWriteRequest.Builder builderWriter = null; builderWriter = plcConnection.writeRequestBuilder(); // builderWriter.addItem("mivariable-26", "%DB20:DBX6.7:BOOL", false); //OK builderWriter.addItem("mivariable-2", "%DB20:DBB06:BYTE", (byte)0); //FAILS // builderWriter.addItem("mivariable-4", "%DB20:DBW06.0:INT", (short)2); //FAILS PlcWriteRequest writeRequest = builderWriter.build(); PlcWriteResponse writeResponse = writeRequest.execute().get(); GeneralFunctions.printPlc4XWriteReponse(writeResponse); //print response } } } ----------------------------------------- Iñigo Angulo ZYLK.net :: consultoría.openSource Ribera de Axpe, 11 Edificio A, modulo 201-203 48950 Erandio (Bizkaia) +34 944272119 -----------------------------------------
