Aerotech SOLOIST, Руководство по оборудованию

Страница: 57 / 118

Soloist Hardware Manual Technical Details
www.aerotech.com 3-13
3.2. Position Synchronized Output (PSO)
The Soloist includes a Position Synchronized Output (PSO) option. This feature may be
programmed to generate an output synchronized to the axis position, based upon a user-
defined trigger condition. The Soloist provides only single-axis tracking of one of the two
encoder input channel. Encoder signals may come from the primary or secondary encoder
channels. These input channels allow a 40 Mhz. input data rate (50 nsec. minimum edge
separation), however, the maximum PSO tracking rate is 25 Mhz. A software command
may also be used to generate an output pulse. The synchronized output pulse is solely
generated within sophisticated and versatile high-speed hardware, providing excellent
firing accuracy, and allowing minimal delays between the trigger condition and the
output. PSO latency is 210 nanoseconds, including the propagation delay of the output
device. The output pulse is a differential RS-422 signal available on the J104 connector
(see Section 3.1.1. for more information). Additionally, the PSO options provide Data
Capture capabilities, shown in Figure 3-11 and Figure 3-12.
For programming
information, refer to the Soloist HMI Help.
Refer to Figure 3-11 and Figure 3-12 for a block diagram of the PSO capabilities.
Table 3-9. PSO Output Source
PSO Output Type Maximum Frequency Requires User Isolation
RS-422 Marker output on the
Secondary Encoder - J104
10 MHz Yes
The PSO hardware operates in machine counts. The PSO hardware typically generates a
trigger from a position change. The comparison of the desired trigger position to feedback
position occurs at a 25 Mhz. rate.
The output pulse is also user programmable, and is generated by dedicated hardware
logic. It may be a single, or multiple pulse per trigger event. A trigger event may generate
a single pulse or a programmable number of pulses.