Using the Simulation 2 Driver
You may prefer to use the SM2 driver over the SIM driver when one or more of the following conditions occur:
- You have more test data than the SIM driver can hold.
- You want to determine how the database responds to 32-bit values.
- You need to access the driver from a C program.
Accessing SM2 Registers
The SM2 driver matrix consists three independent sets of registers, one for analog values, one for digital values, and one for text values. Analog database blocks read from and write to analog registers only. Once a block writes a value, other analog blocks can read the value from the register written to. Digital database blocks work the same way, reading and writing from the digital registers. iFIX clears all SM2 values when iFIX starts.
The SM2 driver does not use the Hardware Options or Signal Conditioning fields.
To use the SM2
register:
- Enter SM2 in the primary block's Device field.
- Complete the I/O Address field with the following syntax:
For Analog values: register
For Digital values: register:bit
For Text values: register
