Instruction manual

“Program Limit +ff” = “PL+ff” = Program +Limit to full scale
“Program Limit -80” = “PL-80” = Program -Limit to half scale
“Program Limit -00” = “PL-00” - Program -Limit to zero
Hexadecimal programming (00h to ffh, 00 to -ffh)
“Program Limit -%99” = “PL-%99” = Program -Limit to full scale
“Program Limit +%50” = “PL+%99” = Program +Limit to half scale
Interval Programming Commands
The BOS/S controller allows the programming of up to 1001 intervals. An interval has
three properties: 1) Control channel programming level.
2) Duration of programming level
3) Pointer to next interval
By “stringing” together a group of intervals a custom waveform can be produced. The
maximum frequency obtainable (2 interval loop, Durations of 0) is about 1300 Hz.
The Control programming levels can vary from -full scale to +full scale.
The Duration is an integer value from 0 to 65535 where each count is equivalent to
1 millisecond. A Duration of 0 indicates that maximum throughput is desired.
The pointer to next interval is an integer between 0 and 1000. When interval
programming is enabled the first interval to be programmed is interval 0. This
technique is similar o that of a “linked list”, where insertion of a new value into an
existing waveform consists of merely using the next available interval and resetting
only two pointers. This provides a greater flexibility than would be realized using a
linear array of values.
Before an interval may be programmed, it must be selected using the “Interval Select”
command. This command takes the form of:
“Interval Select iiii” = “ISiiii” = Select interval iiii, where iiii is an integer 0 to 1000.
If iiii is omitted, the selected interval defaults to 0.
The Interval channel programming level is selected using the same options as normal
control channel programming. Programming level is entered as:
Control in Volts or Amps
Control as a percentage of full scale
Control the DAC directly in hexadecimal.
The syntax is:
“Interval Control 5” = IC5” = Selected interval control level = 5 Volts or Amps
“Interval Control -%50.12” = IC-%50.12” =
Selected interval control level = -%50.12 full scale
“Interval Control heX ffff” = “ICXffff” =
Selected interval control level of DAC is ffff hex.
The Duration is selected using the following syntax:
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83-469-001 Rev. B