Agilent Technologies RS-232, Instruction Manual

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RS-232 and RS-485 Options for the senTorr Gauge Controller
DRA
FT
1-7
6. Use the arrow keys to select the desired address for the unit, from 00 to 99 .
Change the address from the default of 00 if more than one unit is to be installed on the
communication link.
NOTE
It is not necessary to change the address from 00 with an
RS–232 application.
7. Press Enter to save the address and exit baud rate programming.
The default settings are 9600 baud with no parity and an address of 00. After a senTorr
reset or power-up, the serial settings are verified and re-initialized to their default
settings only if they are found to be corrupt.
Command Syntax and Definitions
The command format is:
# {senTorr address} {command} {optional data} {carriage return}
The response format is:
> {optional data} {carriage return}
The senTorr sends ?FF as a response if the command or data is invalid, or if the command
length is incorrect. There is no response to a parity error, wrong address, or lack of
termination character.
The senTorr commands are based on the front panel keypad functions. The optional data
bytes used in the commands indicate the gauge on which the command is operating and
the desired pressure or parameter setting, as necessary.
Table 1-7 lists the convention for numbering the set points.
The senTorr command set is compatible with the Multi-Gauge controller RS–485 serial
command set. While the pressure and parameter data mantissas require that four digits be
sent, the senTorr uses only the two most significant digits for set point and parameter
settings.
Table 1-7 Setpoint Numbering
Set Point Number Set Point Name
1 IG set point
2 TC 1 set point
3 TC2 set point
4 Additional set point