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2.1 Adding the DbDrv driver
The project main file with the DbDrv driver included is shown in Figure 2.1.
There are 2 blocks which must be added to the project to include the driver. First the MODULE block is attached the the Modules output of the EXEC function block. It must be renamed to DbDrv.
The other block named DB is of type IODRV and it is connected to the Drivers output of the main EXEC block. The three most important parameters are:
- – name of the module linked to the driver, in this case DbDrv – the name is CASE SENSITIVE!
- – class of the driver, DbDrv in this particular case
The name is CASE SENSITIVE! - – name of the driver configuration file (*.rio, REX Input/Output), which is discussed in chapter 3
The name of this block (DB, see Fig. 2.1), is the prefix of all input and output signals provided by this driver.
The above mentioned parameters of the IODRV function block are configured in the RexDraw program as shown in Figure 2.2.
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