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greenday

Hi

my problem still exist and my code throw CRC exception.
but finally i can run I/O logging and here is the result:

Stable Library

Native lib Version = RXTX-2.1-7
Java lib Version = RXTX-2.1-7
ready to send connect command
1331106184515 O 011000a80002043535353530f4
1331106184609 I 011000a80002042993
com.serotonin.modbus4j.exception.ModbusTransportException: CRC mismatch: given=1
065, calc=49192
at com.serotonin.modbus4j.base.ModbusUtils.checkCRC(ModbusUtils.java:104
)
at com.serotonin.modbus4j.serial.rtu.RtuMessageResponse.createRtuMessage
Response(RtuMessageResponse.java:41)
at com.serotonin.modbus4j.serial.rtu.RtuMessageParser.parseMessageImpl(R
tuMessageParser.java:41)
at com.serotonin.modbus4j.base.BaseMessageParser.parseMessage(BaseMessag
eParser.java:37)
at com.serotonin.messaging.MessageControl.data(MessageControl.java:170)
at com.serotonin.messaging.InputStreamListener.run(InputStreamListener.j
ava:76)
at java.lang.Thread.run(Unknown Source)
1331106186531 O 011000a80002043535353530f4
1331106186562 I 011000a80002042993
com.serotonin.modbus4j.exception.ModbusTransportException: CRC mismatch: given=1
065, calc=49192
at com.serotonin.modbus4j.base.ModbusUtils.checkCRC(ModbusUtils.java:104
)
at com.serotonin.modbus4j.serial.rtu.RtuMessageResponse.createRtuMessage
Response(RtuMessageResponse.java:41)
at com.serotonin.modbus4j.serial.rtu.RtuMessageParser.parseMessageImpl(R
tuMessageParser.java:41)
at com.serotonin.modbus4j.base.BaseMessageParser.parseMessage(BaseMessag
eParser.java:37)
at com.serotonin.messaging.MessageControl.data(MessageControl.java:170)
at com.serotonin.messaging.InputStreamListener.run(InputStreamListener.j
ava:76)

greenday

Sorry, but i can not find ModbusMaster.setIoLog(...) or ModbusMaster.setDiscardDataDelay(...) in Modbus4j library project.
I'm sure that i use last version of modbus4j that i download from sourceforge, so what can i do now?

update 1 -------------------------------------

Ok now i found that those functions are in cvs repository,
i will try them and send report here

update 2 -------------------------------------

i try to use IoLog, but nothing happen, logger did not write even an character!!!
about setDiscardDataDelay also nothing happen,

but i found that if i ignore the exception, i can run the next command on my device without error!
because the data that we send and receive is correct.

so what is that crc problem?

greenday

Thanks for your reply, but how to enable IO logging ?

greenday

i have a problem to send a command to a device and get response,
there is an exception that say CRC is mismatch but, i attached the request and response sniffed by serial monitor
it seems everything is ok, but why i get CRC mismatch exception!!!?

Native lib Version = RXTX-2.1-7
Java lib Version = RXTX-2.1-7
ready to send connect command
com.serotonin.modbus4j.exception.ModbusTransportException: CRC mismatch: given=1
065, calc=49192
at com.serotonin.modbus4j.base.ModbusUtils.checkCRC(ModbusUtils.java:87)

    at com.serotonin.modbus4j.serial.rtu.RtuMessageResponse.createRtuMessage

Response(RtuMessageResponse.java:21)
at com.serotonin.modbus4j.serial.rtu.RtuMessageParser.parseMessageImpl(R
tuMessageParser.java:21)
at com.serotonin.modbus4j.base.BaseMessageParser.parseMessage(BaseMessag
eParser.java:17)
at com.serotonin.messaging.MessageControl.data(MessageControl.java:133)
at com.serotonin.messaging.InputStreamListener.run(InputStreamListener.j
ava:76)
at java.lang.Thread.run(Unknown Source)

**Request: 2012/03/03 02:26:34 ?.?.07964 (+23.5156 seconds)

01 10 00 A8 00 02 04 35 35 35 35 30 F4 ...¨...55550ô

Answer: 2012/03/03 02:26:34 ?.?.12664 (+0.0469 seconds)

01 10 00 A8 00 02 04 29 93 ...¨...)?

**

greenday