Try these steps:

1. Create Modbus Serial data source
2. Create numeric point as Holding Register and 2 byte signed integer
3. Make this point writable
   4. Set multiplier to 0.1 for this point

Isuue:
Try to write 12.7 to this point. Actually written value is 126 (instead of 127).
I think problem is in method setPointValue() of class ModbusDataSource.

 
    ...
           if (dataPoint.getDataTypeId() == DataTypes.NUMERIC) {
                double convertedValue = valueTime.getDoubleValue();
                convertedValue -= pl.getVO().getAdditive();
                convertedValue /= pl.getVO().getMultiplier();
                modbusMaster.setValue(ml, convertedValue);
            }
    ...

convertedValue gets 126.99999999999999. Fractional part of this value gets lost in method modbusMaster.setValue().

Try these steps:

1. Create Modbus Serial data source
2. Create numeric point as Holding Register and 2 byte signed integer
3. Make this point writable
   4. Set multiplier to 0.1 for this point

Isuue:
Try to write 12.7 to this point. Actually written value is 126 (instead of 127).
I think problem is in method setPointValue() of class ModbusDataSource.

 
    ...
           if (dataPoint.getDataTypeId() == DataTypes.NUMERIC) {
                double convertedValue = valueTime.getDoubleValue();
                convertedValue -= pl.getVO().getAdditive();
                convertedValue /= pl.getVO().getMultiplier();
                modbusMaster.setValue(ml, convertedValue);
            }
    ...

convertedValue gets 126.99999999999999. Fractional part of this value gets lost in method modbusMaster.setValue().

Hi!
I've added a new user, after that I've added some data sources.
When I try to give that user access to the new data sources (in the "Users" page) I've got an error message:

PreparedStatementCallback; SQL [update users set username=?, password=?, email=?, phone=?, admin=?, disabled=?, homeUrl=?, receiveAlarmEmails=?, receiveOwnAuditEvents=? where id=?]; An attempt was made to get a data value of type 'VARCHAR' from a data value of type 'null'.; nested exception is java.sql.SQLDataException: An attempt was made to get a data value of type 'VARCHAR' from a data value of type 'null'.

The same message I've seen trying to change user password.

Hi!
I've added a new user, after that I've added some data sources.
When I try to give that user access to the new data sources (in the "Users" page) I've got an error message:

PreparedStatementCallback; SQL [update users set username=?, password=?, email=?, phone=?, admin=?, disabled=?, homeUrl=?, receiveAlarmEmails=?, receiveOwnAuditEvents=? where id=?]; An attempt was made to get a data value of type 'VARCHAR' from a data value of type 'null'.; nested exception is java.sql.SQLDataException: An attempt was made to get a data value of type 'VARCHAR' from a data value of type 'null'.

The same message I've seen trying to change user password.

Just downloaded version 1.2.4. Same problem.

I'm getting this message when I try to stop the server.
"tried to access field gnu.io.RXTXPort.IOLocked from class gnu.io.RXTXHack"
The server is freezed after that and I have to kill the process.

Same message appears when I try to disable data source.

My platform is:
Windows XP,
Apache Tomcat 7.0
mango 1.12.2 (the same situation with tomcat 6 and mango 1.12.0)

To simulate modbus slaves I use Null-modem emulator (com0com) (http://com0com.sourceforge.net/)
and MOD_RSSIM (http://www.plcsimulator.org/)

Data sources and points JSON is attached.

Thanks in advance for any help.

Attachment: download link

I'm getting this message when I try to stop the server.
"tried to access field gnu.io.RXTXPort.IOLocked from class gnu.io.RXTXHack"
The server is freezed after that and I have to kill the process.

Same message appears when I try to disable data source.

My platform is:
Windows XP,
Apache Tomcat 7.0
mango 1.12.2 (the same situation with tomcat 6 and mango 1.12.0)

To simulate modbus slaves I use Null-modem emulator (com0com) (http://com0com.sourceforge.net/)
and MOD_RSSIM (http://www.plcsimulator.org/)

Data sources and points JSON is attached.

Thanks in advance for any help.

Thanks for your answer, Matthew.
But time in scriptPoint is not what I need. It is the time of last point update (at least for MODBUS points), but I need the time when point value changed.

Is it possible to get a point value's last change time and display it on custom page?

Is it possible to get a point value's last change time and display it on custom page?