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Using
the GigaTerm utility, it is possible to apply scaling and offest
values to the raw analogue input so that data can be recorded in
engineering units.
Digital
The
8 inputs can also be used as digital inputs: logic 0 is 0-0.8v while
a logic 1 is 3.5V-5V. The digital input has an internal pull-up and
so volt-free contacts can be simply connected to the input and 0V. A
closed contact will register as logic 0.
Counter
The
8 inputs can also be configured as 32-bit counters. Inputs can be
logic pulse or contact closure. The input needs to be greater than
1ms in duration. The maximum count frequency is 500Hz. Every write to
the CF card resets the counter to zero.
RS232
All
data presented to GigaLog from the serial RS232 interface will be
stored on the CF card in a datafile. A data frame from the RS232 port
is any consecutive data until there is a gap of at least 0.5 seconds.
GigaLog can be configured to add a time stamp (yyyy:mm:dd hh:mm:ss)
in front and/or at the end of a data frame.
Input
RS232 data is required to be of the form 8 bits, no parity. Baud
rates can be 300, 600, 1200, 2400, 4800, 9600, 19200, 28800, 38400,
57600 and 115200. Data can be transferred ignoring flow control up to
115200 baud.
Construction
All
I/O signals and Power are attached via screw terminals. The GigaLog
has a standard 9-way D-type RS232 port. A 16 x 2 line LCD displays
the state of the unit. For incoming RS232 data, the number of bytes
received in last frame and total number of bytes in the file is
displayed. When sampling analogue data, the display shows the raw
input values, and the total number of bytes in the file.
A
box mounted toggle switch starts/stops the logger, and a red LED
shows CF write activity |