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The asterisk (*) items are related. The TCV controls the use of the preset SLTC-FM Switch
Wrench via the amount of time it spends in the “clicked” position. The AC Open Protocol does
not have parameters for this, so it cannot be bar coded into the system. The SLTC-FM Switch
Wrench does not have angle. This means that when in use, the parameter items can be used
for time instead of angle, and that capability has been provided. Your specific application of the
AC Open Protocol determines the applicability of some items.
Where no value is reported, the field is handled as required by the protocol.
The bar code reader must be set up to communicate using 8 bits, No-parity, and one stop bit,
and the bar codes themselves must be properly formatted. See the bar code samples and rules
below.
To program the unit to work with a bar code reader,
scroll to the Bar Code Reader function in the
display.Press the Enter button when the item is active.
Use the Up and Down arrow button to scroll through
the available options. The options are Off and the
available baud rates for communication with the read-
er. Note that if a serial printer is used in tandem with a
bar code reader, the two must communicate at the
same baud rate. When the desired option or baud rate
is displayed on the screen, press the Enter button to
select and set it.
Bar Code Rules and Examples
To have the bar code reader decipher a given bar code as a command, the bar code must be
formatted in a specific way. Using code 39 bar codes, the bar code must begin and end with an
asterisk “*”.
The bar code will also contain command and data sections. Each section of the bar code will be
separated by percent “%” symbols.
For example, the command for the Cell ID is 01. The Cell ID data string is 4 data bytes long. So
if the assigned Cell ID was programmed to be 1234, then the bar code would look like this:
*%01%1234%*
Bar code samples and rules for various commands and common uses are given on the pages
immediately following.
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