Multi-Thread Capability in SilverDust

Description

QuickSilver Controls adds Multi-Thread capability to its SilverDust line of servo controller/drivers for NEMA 17 and 23 frame motors. It is now possible to have two programs executing simultaneously in the same controller. This is ideal for motion applications where the servo controller is being used as the main logic controller (i.e. replacing a PLC). One thread can be used to execute motion oriented programs while the second is dedicated to I/O processing.

With both program threads running, the SilverDust’s instruction execute time is 240 microseconds as opposed to 120 microseconds in single thread operation. This is the only performance hit. The 8KHz servo loop executes as normal as does the 1MB CANOpen and 230KB serial channels.

Both threads or programs share the same data registers to make passing information between threads easy and intuitive. For example, either thread can change position or velocity by modifying the respective registers.

Either thread can change or terminate the execution of the other thread. Advanced debugging features include single step and breakpoint operations on one thread while the other thread is executing normally.

Specs

• Operational Temperature --10 C to +80 C • Storage Temperature - - 40 C to +85 C • Humidity - Continuous specification is 95% RH non-condensing. • Shock - Limitation is approximately 50g/11ms. • IP Rating - IP20 with cables attached. • Voltage - +12 VDC to +48 VDC, regulated. Device must be initialized for the actual operating voltage. • Over-Voltage Protection - None available. Voltages exceeding +55 VDC will permanently damage the controller/driver electronics. The IGB includes an onboard clamp circuit. Power rating is dependent upon • operation, but should be at least 10W. • Reverse Polarity Protection - Reverse polarity protection is available on the SilverDust IGB. (Note, however, if power supply is not floating, connecting the V+ input to Ground will cause this potential to be present at the communications and I/O lines, which may damage these lines or that to which they are connected. • Input Current - 4 Amps maximum for any input voltage, +12 VDC to +48 VDC. • Output Power - Output/Driver Current - 3.5 Amps continuous per phase *; 4.5 Amps peak per phase *. • With Adequate Heat Sink. • Maximum Output Power - 150 Watts continuous power with adequate heat dissipation. • Encoder Interface - 2000 Lines = 8000 counts/revolution • Designed to work with QCI’s I-Grade motor/encoders. Quadrature differential signals are • employed.
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