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78
2000I & 2000M User Guide, Rev B
Selecting RS232
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To select the RS232 data format:
1. Repetively press the MNU key until the “SET RS232” selection
displays.
2. Press any of the Units/Enter keys (V, A, ºC or ºF) to select this action.
The unit will then display the presently selected baud rate for the RS232
interface.
3. You may alter the baud by using any of the arrow keys (2, 4, 6 or 8) until
the desired rate is shown. Press any of the Units/Enter keys to select a
new baud rate.
Note:
Ensure that the computer is connected to the RS232 port, set to this
baud rate and set for 8 bit data with no parity, 1 stop bit and 1 start bit.
With the RS-BAT option there is no defined remote or local states, thus the
instrument will respond to commands from either the front panel or the
interface, as applicable.
RS232 Handshake Lines
The RS-BAT interface is configured to use the RS232 hardware handshake
lines RTS and CTS to handshake data. The usage of these hardware
handshake lines ensures that data will not be lost due to differences in
processing speeds between the 2000 instrument and the computer. Sometimes
the particular computer used will not be able to use these handshake lines
properly. To prevent
data overrun, place delays between sending individual
command strings.
IEEE488 Interface Option
The IE-BAT option enables the 2000 instruments to be controlled or
interrogated by any IE-BAT interfaced computer. This interface is fully
isolated from the analog circuitry of the 2000I and 2000M DC power source
instruments for voltages of up to 500V.