Teledyne HASTINGS 2002, Instruction Manual, Page: 29 / 49

page 29
Interrogation Commands
Command Description Format Sample Response
Transmit Averaged Pressure P<CR> Pa: 1.0 Torr<CR>
Transmit Pirani Pressure R<CR> Pr: 1.98765e-3 Torr<CR>
Transmit Piezo Pressure Z<CR> Pz: 7.2 Torr<CR>
Transmit RS-485 Address A<CR> Multidrop Address: 01<CR>
Transmit Decimation Ratio D<CR> Decimation Ratio: 255<CR>
Transmit Selected Gas # G<CR> Gas#: 0<CR>
Transmit High Setpoint H<CR> Hi: 1.1 Torr<CR>
Transmit Low Setpoint L<CR> Lo: 1.00000e-2 Torr<CR>
Transmit Device Status S<CR> 00044<CR>
Transmit Turnaround Delay T<CR> Comm Delay: 6<CR>
Transmit Selected Units U<CR> Torr<CR>
Transmit Software Version# V<CR> Hastings Instruments - Model 2002
Version 1.4 - (7-23-98)<CR>
Parameter Modification Commands
Command Description Format Valid Range:
Modify High Setpoint H={m.dd}E{+e}<CR> 1.00000e-9 to 9.9
Modify Low Setpoint L={m.dd}E{-e}<CR> 1.00000e-9 to 9.9
Modify Selected Gas # G={d}<CR> 0 To 4 (Decimal)
Modify Selected Units U={u}<CR> T, or M, {or P, if Available}
Modify Decimation Ratio D={dddd}<CR> 63 To 7936 (Decimal)
Modify RS-485 Address *{aa}A={aa}<CR> 1 To FF (Hexadecimal)
Modify Turnaround Delay *{aa}T={dd}<CR> 0 To 255 (Decimal)
Notes:
The setpoints may also be entered as a decimal number, e.g. [H=760.99<CR>] will be same as
entering [H=7.6099E+2<CR>] .
When inputting setpoint data, it should be entered in the same Units of Pressure as the presently
selected Units of Measurement (i.e.Torr, mbar or Pascal). The data is only checked to be a valid
number with a one digit exponent before being accepted. There are no limit checks on the data, the
user is free to choose any value appropriate to his use of the instrument.
The Turnaround Delay and RS-485 address are unique to multipoint communications. In order to
prevent inadvertent modifications of these parameters, the multipoint attention character and the
Model 2002’s present address [*{aa}] MUST be used and are checked for validity before the
command is executed.