10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com
5-11
PROGRAMMING AND INTERFACING
RS232 Device Dependent Commands Supplementary Information
Functional information is provided for the RS232 device dependent commands that require additional
information for use. The RS232 connector, J4, is a DB9 type and is compatible with most 9-pin RS232
cables. The information below is to be used with the RS232 command summary table to gain a
complete understanding of the command functions.
To acquire a reading requires three events to take place.
1) The trigger type must be selected and armed;
2) The previous trigger must be stopped and a new trigger must be instructed;
3) A new value must be returned after the 1750 completes a reading. Below is a breakdown of the
trigger modes and commands via GPIB interface.
Step #1 does not have to be done with all readings once the correct trigger mode is programmed. The
stopping of triggers applies only to continuous modes. One Shot modes are stopped automatically.
T0, T1, T2, and T3 [Trigger on E]
a) Issue a T0, T1, T2, or T3 to select or arm the trigger. Sending an “E” will stop the old trigger
and provide a new trigger to begin the next acquisition.
b) It will also return a reading after it has been completed by the 1750. One “E” command will
perform two separate actions.
T4, T5, T6, and T7 [Trigger on GET]
a) Issue a T4, T5, T6, or T7 to select and arm the new trigger. Issuing the GET command will
stop the old trigger and provide a new trigger to begin the next acquisition.
b) Sending an “E” will return a reading after it has been completed by the 1750.
Returned ASCII Values:
a) “1.2345 mOhm” – A resistance reading will be returned to the PC in this format.
b) “2.9999 or 29.999” – This returned value indicates that there is an over range condition.
This value may also indicate an open wire condition for ranges below 200 Ω.
Range – R0, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, 15, R16, R17, R18, R19.
Delay – Dnnn – where nnn=0-250 ms
Frequency – F0, F1
Trigger – T0, T1, T2, T3, T4, T5, T6, T7
Display Mode – P0, P1, P2
Terminators – Y0, Y1, Y2, Y3, Y4; CR= carriage return, LF= line feed
Save Setup – Sn – where n=1-9
Recall Setup – Cn – where n=0-9
Limits – L0, L1, L2, L3, L4
To Next Page
Loading...
