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ADVANCED MICRO SYSTEMS, INC. SMC-27X2 SOFTWARE
32
Default Table
The following default values are written to NV memory after the ‘Clear’(C 1) command:
Parameter Value
Initial Velocity (I) 800 SPS
Slew Velocity (V) 10,000 SPS
Divide Factor (D) 1
Ramp Slope (K) 5
Decay threshold (b) 30
Jog Speeds (B) 90/600
Trip Point (T) Off
Mode (H) 1/4 micro step
PLC(l) Off (invert all inputs)
Limit Polarity (l) Low assert
Auto Position Readout (Z) Off
Name (after reset) Unchanged
User Programs (0-191) Cleared
Turbo Ram
The SMC-27X2 has a small, dedicated memory area called Turbo Ram. There are 64 bytes, which reside
between address location 128 and 192. Instructions written here during program mode use “real” internal
RAM rather than EEPROM in order to achieve these advantages:
1. Very fast execution. EEPROM access time is 1 Ms. or more per byte.
2. No wear and tear on the EEPROM.
3. The trip service routine executes at address 160.
Macros may be downloaded directly into this area and executed as frequently as desired. Programs in this
area are stored in corresponding NV memory and “down-loaded” at power up, making an effective shadow
RAM.
Command behavior between address locations128 and 192
Q: List from RAM
P: Program to RAM
S: Copy to EEPROM
]: Write to EEPROM
\: Read from EEPROM
C1: Clear EEPROM, reload register