Computer Weld Technology Micro ADM, Руководство по эксплуатации и установке

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3.0 OPERATION
3.1 Arc Detection
“Auto Arc On” is not available if firmware is Version 2.31 and later.
If the “Auto Arc On” mode is enabled the sensor will use the Arc Voltage and
Current to determine when to log welding data. Both parameters must exceed
the user defined threshold values to set an “Arc On” condition. When the Voltage
or Current falls below the user specified value the sensor would set an “Arc Off”
condition and stop data logging. The user must activate this input by setting the
corresponding mode via the serial communication port.
If the “Auto Arc On” mode is disabled the user can force a arc on condition by
asserting the “Remote Arc On” input. This signal is the “Black” wire provided in
the sensor serial communication cable P/N A3W5042. Asserting a 5-24 VDC
signal from the common (Grey) and the remote arc on input (Black) will force a
sensor arc on condition.
3.2 Embedded Firmware
The embedded firmware has basic scaling and averaging capabilities as well as
Slave mode ModBus RTU Communications protocol support. The sensor will
provide user defined average and data collection mode to allow Run time and/or
average data storage. The Run time data will be generated based on the
averaging sample time specified by the user. The Raw analog data will be
sampled at a 5 kHz rate. The Sensor will average 5 samples to produce a 1khz
data rate for all analog sensors. The Wire feed conversion time will be based on
the actual wire feed rate (16.6 Hz – 16.6 KHz).
Configuration of scaling and averaging parameters will be possible through the
ModBus network port. The user may specify the number of samples (X) to be
averaged before saving the data point in memory for later play back. The
SENSOR will also generate a weld summary for each weld, which will be the
average of all sampled data during the last weld cycle. The Data will be
Date/Time stamped and stored in NV-RAM. Up to 1300 weld summaries may be
stored before downloading. The sensor provides continuous averaging of the X
most recent data values, and queries by the host system at lower frequencies of
either last data value or last average value.
3.3 Host System Serial Interface
The sensor will provide a RS-485 compatible serial port and will support the
ModBus RTU protocol. The Sensor default baud rate is 19.2K Baud.
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