Aerotech Soloist MP 10, Руководство по оборудованию

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76 Chapter 3 www.aerotech.com
3.6.1. Position Synchronized Output (PSO)/Laser Firing (J201)
The PSO can be programmed to generate an output synchronized to the feedback position and is typically
used to fire a laser or sequence an external device. Trigger signals may be derived from a feedback channel
or a software trigger. The position synchronized output pulse is generated using high-speed hardware,
allowing minimal latency between the trigger condition and the output.
The PSO output is available on the dual-function AUX Marker/PSO signal lines. The auxiliary marker must
be configured as an output using the PSOOUTPUT CONTROL command. Refer to the Help File for more
information.
An RS-422 line receiver or opto-isolator is recommended, especially when using long cable lengths in noisy
environments or when high frequency pulse transmission is required. It is best to locate the line receiver or
opto-isolator close to the receiving electronics.
Table 3-20: PSO Specifications
Specification Value
Maximum Input Tracking Rate
(1)
Single-Axis Tracking 16.6 MHz
Maximum Quadrature Encoder Output
Frequency
Standard Feedback 40 MHz
Maximum PSO Output (Fire) Frequency
(2)
12.5 MHz
Firing Latency Single-Axis Tracking 160 nsec
1.
Signals in excess of this rate will cause a loss of PSO accuracy.
2.
The optocoupler that you use on the output might have an effect on this rate.
N O T E : When using the MRK± signals with single-ended systems, do not connect MRK+ or MRK- to
GROUND (GND).
N O T E : The PSO feature is not compatible with the -MXU option.
Software controlled PSO pre-scalars may be used to limit the data rate of each encoder being tracked
without affecting the servo loop data rate.
Table 3-21: PSO Output Pins on the Auxiliary Encoder Connector (J201)
Pin# Description In/Out/Bi
1 Auxiliary RS-422 Marker Pulse - / PSO Output Bidirectional
6 Auxiliary RS-422 Marker Pulse +/ PSO Output Bidirectional
8 Encoder Power Common N/A
Soloist MP -IO Expansion Board