Thanks for answering!
If I already fix the syntax errors that I had in the .things file but likewise I have the same error, I previously configed it with the PaperUI but since many posts were configured by the .things file I started doing it that way
Here I put the poller status error and the openhab logs when it starts.
Status things Serial
the status of “Endpoint for Modbus serial slaves” If you are online
Status things Data
Error (ModbusSlaveIOExceptionImpl) with read. Request: ModbusPollerThingHandlerImpl.ModbusPollerReadRequest@49b0608a[slaveId=10,functionCode=READ_INPUT_REGISTERS,start=5,length=2,maxTries=3]. Description: ModbusSlaveIOException(cause=ModbusIOException, EOF=false, message='I/O exception: IOException Error reading response (EOF)', cause2=null). Message: Modbus IO Error with cause=ModbusIOException, EOF=false, message='I/O exception: IOException Error reading response (EOF)', cause2=null
Status things Poller
org.openhab.io.transport.modbus.internal.ModbusSlaveIOExceptionImpl: Modbus IO Error with cause=ModbusIOException, EOF=false, message='I/O exception: IOException Error reading response (EOF)', cause2=null
Logs Openhab Start
2018-09-20 10:49:05.260 [ERROR] [pi.modbus.io.ModbusSerialTransaction] - execute try 1/1 error: I/O exception: IOException Error reading response (EOF). Request: net.wimpi.modbus.msg.ReadInputRegistersRequest@5a1f714b (unit id 10 & transaction 1). Serial parameters: SerialParameters@12243cc4[portName=COM10,baudRate=38400,flowControlIn=none,flowControlOut=none,databits=8,stopbits=1,parity=none,encoding=rtu,echo=false,receiveTimeoutMillis=1500]
2018-09-20 10:49:05.261 [ERROR] [pi.modbus.io.ModbusSerialTransaction] - execute reached max tries 1, throwing last error: I/O exception: IOException Error reading response (EOF). Request: net.wimpi.modbus.msg.ReadInputRegistersRequest@5a1f714b (unit id 10 & transaction 1). Serial parameters: SerialParameters@12243cc4[portName=COM10,baudRate=38400,flowControlIn=none,flowControlOut=none,databits=8,stopbits=1,parity=none,encoding=rtu,echo=false,receiveTimeoutMillis=1500]
2018-09-20 10:49:05.261 [WARN ] [rt.modbus.internal.ModbusManagerImpl] - Try 1 out of 3 failed when executing request (ModbusPollerThingHandlerImpl.ModbusPollerReadRequest@49b0608a[slaveId=10,functionCode=READ_INPUT_REGISTERS,start=5,length=2,maxTries=3]). Will try again soon. Error was I/O error, so reseting the connection. Error details: net.wimpi.modbus.ModbusIOException I/O exception: IOException Error reading response (EOF) [operation ID dd456062-cf4d-4cdb-bd47-54364813255a]
2018-09-20 10:49:06.809 [ERROR] [t.wimpi.modbus.io.ModbusRTUTransport] - Last request: 0a 04 00 05 00 02 60 b1
2018-09-20 10:49:06.809 [ERROR] [t.wimpi.modbus.io.ModbusRTUTransport] - failed to read: Error reading response (EOF)
2018-09-20 10:49:06.811 [ERROR] [pi.modbus.io.ModbusSerialTransaction] - execute try 1/1 error: I/O exception: IOException Error reading response (EOF). Request: net.wimpi.modbus.msg.ReadInputRegistersRequest@71222709 (unit id 10 & transaction 2). Serial parameters: SerialParameters@12243cc4[portName=COM10,baudRate=38400,flowControlIn=none,flowControlOut=none,databits=8,stopbits=1,parity=none,encoding=rtu,echo=false,receiveTimeoutMillis=1500]
2018-09-20 10:49:06.812 [ERROR] [pi.modbus.io.ModbusSerialTransaction] - execute reached max tries 1, throwing last error: I/O exception: IOException Error reading response (EOF). Request: net.wimpi.modbus.msg.ReadInputRegistersRequest@71222709 (unit id 10 & transaction 2). Serial parameters: SerialParameters@12243cc4[portName=COM10,baudRate=38400,flowControlIn=none,flowControlOut=none,databits=8,stopbits=1,parity=none,encoding=rtu,echo=false,receiveTimeoutMillis=1500]
2018-09-20 10:49:06.812 [WARN ] [rt.modbus.internal.ModbusManagerImpl] - Try 2 out of 3 failed when executing request (ModbusPollerThingHandlerImpl.ModbusPollerReadRequest@49b0608a[slaveId=10,functionCode=READ_INPUT_REGISTERS,start=5,length=2,maxTries=3]). Will try again soon. Error was I/O error, so reseting the connection. Error details: net.wimpi.modbus.ModbusIOException I/O exception: IOException Error reading response (EOF) [operation ID dd456062-cf4d-4cdb-bd47-54364813255a]
2018-09-20 10:49:08.357 [ERROR] [t.wimpi.modbus.io.ModbusRTUTransport] - Last request: 0a 04 00 05 00 02 60 b1
2018-09-20 10:49:08.357 [ERROR] [t.wimpi.modbus.io.ModbusRTUTransport] - failed to read: Error reading response (EOF)
2018-09-20 10:49:08.359 [ERROR] [pi.modbus.io.ModbusSerialTransaction] - execute try 1/1 error: I/O exception: IOException Error reading response (EOF). Request: net.wimpi.modbus.msg.ReadInputRegistersRequest@2029c023 (unit id 10 & transaction 3). Serial parameters: SerialParameters@12243cc4[portName=COM10,baudRate=38400,flowControlIn=none,flowControlOut=none,databits=8,stopbits=1,parity=none,encoding=rtu,echo=false,receiveTimeoutMillis=1500]
2018-09-20 10:49:08.360 [ERROR] [pi.modbus.io.ModbusSerialTransaction] - execute reached max tries 1, throwing last error: I/O exception: IOException Error reading response (EOF). Request: net.wimpi.modbus.msg.ReadInputRegistersRequest@2029c023 (unit id 10 & transaction 3). Serial parameters: SerialParameters@12243cc4[portName=COM10,baudRate=38400,flowControlIn=none,flowControlOut=none,databits=8,stopbits=1,parity=none,encoding=rtu,echo=false,receiveTimeoutMillis=1500]
2018-09-20 10:49:08.360 [ERROR] [rt.modbus.internal.ModbusManagerImpl] - Last try 3 failed when executing request (ModbusPollerThingHandlerImpl.ModbusPollerReadRequest@49b0608a[slaveId=10,functionCode=READ_INPUT_REGISTERS,start=5,length=2,maxTries=3]). Aborting. Error was I/O error, so reseting the connection. Error details: net.wimpi.modbus.ModbusIOException I/O exception: IOException Error reading response (EOF) [operation ID dd456062-cf4d-4cdb-bd47-54364813255a]
2018-09-20 10:49:08.367 [ERROR] [odbus.handler.ModbusDataThingHandler] - Thing modbus:data:localhost:inputRegisters:Data 'Modbus data' had ModbusSlaveIOExceptionImpl error on read: ModbusSlaveIOException(cause=ModbusIOException, EOF=false, message='I/O exception: IOException Error reading response (EOF)', cause2=null)
2018-09-20 10:49:10.885 [ERROR] [t.wimpi.modbus.io.ModbusRTUTransport] - Last request: 0a 04 00 05 00 02 60 b1
2018-09-20 10:49:10.885 [ERROR] [t.wimpi.modbus.io.ModbusRTUTransport] - failed to read: Error reading response (EOF)
2018-09-20 10:49:10.888 [ERROR] [pi.modbus.io.ModbusSerialTransaction] - execute try 1/1 error: I/O exception: IOException Error reading response (EOF). Request: net.wimpi.modbus.msg.ReadInputRegistersRequest@65929bfa (unit id 10 & transaction 4). Serial parameters: SerialParameters@12243cc4[portName=COM10,baudRate=38400,flowControlIn=none,flowControlOut=none,databits=8,stopbits=1,parity=none,encoding=rtu,echo=false,receiveTimeoutMillis=1500]
2018-09-20 10:49:10.888 [ERROR] [pi.modbus.io.ModbusSerialTransaction] - execute reached max tries 1, throwing last error: I/O exception: IOException Error reading response (EOF). Request: net.wimpi.modbus.msg.ReadInputRegistersRequest@65929bfa (unit id 10 & transaction 4). Serial parameters: SerialParameters@12243cc4[portName=COM10,baudRate=38400,flowControlIn=none,flowControlOut=none,databits=8,stopbits=1,parity=none,encoding=rtu,echo=false,receiveTimeoutMillis=1500]
2018-09-20 10:49:10.889 [WARN ] [rt.modbus.internal.ModbusManagerImpl] - Try 1 out of 3 failed when executing request (ModbusPollerThingHandlerImpl.ModbusPollerReadRequest@49b0608a[slaveId=10,functionCode=READ_INPUT_REGISTERS,start=5,length=2,maxTries=3]). Will try again soon. Error was I/O error, so reseting the connection. Error details: net.wimpi.modbus.ModbusIOException I/O exception: IOException Error reading response (EOF) [operation ID 7666e58a-f667-4f91-8fd5-4a5ba34f8ef9]
2018-09-20 10:49:12.438 [ERROR] [t.wimpi.modbus.io.ModbusRTUTransport] - Last request: 0a 04 00 05 00 02 60 b1
2018-09-20 10:49:12.438 [ERROR] [t.wimpi.modbus.io.ModbusRTUTransport] - failed to read: Error reading response (EOF)
2018-09-20 10:49:12.440 [ERROR] [pi.modbus.io.ModbusSerialTransaction] - execute try 1/1 error: I/O exception: IOException Error reading response (EOF). Request: net.wimpi.modbus.msg.ReadInputRegistersRequest@68040195 (unit id 10 & transaction 5). Serial parameters: SerialParameters@12243cc4[portName=COM10,baudRate=38400,flowControlIn=none,flowControlOut=none,databits=8,stopbits=1,parity=none,encoding=rtu,echo=false,receiveTimeoutMillis=1500]
2018-09-20 10:49:12.441 [ERROR] [pi.modbus.io.ModbusSerialTransaction] - execute reached max tries 1, throwing last error: I/O exception: IOException Error reading response (EOF). Request: net.wimpi.modbus.msg.ReadInputRegistersRequest@68040195 (unit id 10 & transaction 5). Serial parameters: SerialParameters@12243cc4[portName=COM10,baudRate=38400,flowControlIn=none,flowControlOut=none,databits=8,stopbits=1,parity=none,encoding=rtu,echo=false,receiveTimeoutMillis=1500]
2018-09-20 10:49:12.441 [WARN ] [rt.modbus.internal.ModbusManagerImpl] - Try 2 out of 3 failed when executing request (ModbusPollerThingHandlerImpl.ModbusPollerReadRequest@49b0608a[slaveId=10,functionCode=READ_INPUT_REGISTERS,start=5,length=2,maxTries=3]). Will try again soon. Error was I/O error, so reseting the connection. Error details: net.wimpi.modbus.ModbusIOException I/O exception: IOException Error reading response (EOF) [operation ID 7666e58a-f667-4f91-8fd5-4a5ba34f8ef9]