Acuity AccuRange AR500, Руководство пользователя

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AR500 User’s Manual
LLL00xxxx – Rev 1.0 19
8. Performance Optimization
This section describes how to configure the AR500 sensor for best use in your
particular application.
8.1 Baud Rate (04h)
The AR500 automatically begins measuring and outputting distance
measurements to the analog and serial lines when powered-up. The default
baud rate is 9600 bit/s.
Users may select among several baud rates that will optimize the sensors’
speed or accuracy performances over a serial connection.
Parameter 04h has values from 1 – 192 which specifies the data transfer rate
in multiples of 2400. The default value is 4 (9600 bit/s).
8.2 Laser ON/OFF (00h)
This serial function toggles the laser ON or OFF. The default setting is ON.
Note that there exists a hardware Logic line which can control the laser’s sate
as well. See Laser Disable feature in section 7.
Parameter 00h has values from 1 or 0 for ON or OFF, respectively.
8.3 Network Address (03h)
This parameter defines the network address of the sensor equipped with
RS485 interface. The factory default value is 1.
Network data communications protocols assume the presence of a ‘master’ in
the network, which can be a computer or other information-gathering device,
and from 1 to 127 ‘slaves’ (AR500 Series sensors) which support the
protocol.
Each ‘slave’ is assigned a unique network identification code – a device
address. The address is used to form requests or inquiries all over the
network. Each slave receives inquiries containing its unique address as well
as ‘0’ address which is broadcast-oriented and can be used for formation of
generic commands, for example, for simultaneous latching of values of all
sensors and for working with only one sensor (with both RS232 port and
RS485 port).
Parameter 03h can be assigned values from 1 – 127. The factory default is
1.
8.4 Zero Point (17h, 18h)
This parameter allows the user to set a zero point within the sensor’s
measurement span. The factory default value for the zero point is the
beginning of the measurement span. Note that users can also set the zero
point through hardware controls. See Zero Point in section 7.
Parameter
17h is the LOW byte of the Zero Point and has values 0 - 4000h
with default value 0.