Measurement Computing Analyzer488 - Manual (Page 234)

Section 6 Instrument Simulator
6.24
Status Un
The Status command, Un, is used to return a command status message, or a
keyboard status message.
The Status command U0 will cause the Analyzer488 to send a command status
message when next addressed to talk. The command status message shows the current
options which are in use for each command. The command status of the Analyzer488
may be read at any time without interfering with normal operation. Any error
conditions are cleared after the status string is read by the controller.
The format of the status byte returned by the Analyzer488 after receiving a U0
command is as follows:
*.*C#####D#E#G#H#I###J#K#P###S###T#####U#W##Y#Z###
where each # shows the current option in use for that command. The leading
information *.* is the revision level of the Analyzer488 firmware.
The Status command U1 returns the key code for a key pressed on the
Analyzer488 front panel keyboard. A key code, 0 to 44, is returned if a key is pressed,
the value 255 is returned if no key is pressed.
The Status command U2 waits up to 10 seconds for a key press from the
Analyzer488 front panel keyboard. A key code, 0 to 44, is returned if a key is pressed,
the value 255 is returned if no key is pressed before 10 seconds have elapsed.
The following illustration shows the key codes for the Analyzer488 front panel
keyboard:
RATE NONE
ERASE ZERO SET REL
+TRIGGER -TRIGGER FIND
DISPLAY MEASURE HEX BIN
PRINT
HANDSHAKE
MEMORY
SEARCH
TRIGGER
SOURCE
SHIFT
CURSOR
CONTROL
DATA ENTRY
FAST SLOW STEP LISTEN TALK EOI ATN SRQ REN IFC
EXIT
D ENTER E
3 C
B 5 6
2
F
+/- SAVE HELP
0
1
4
NEXT LAST FIRST
STAT SETUP ARM
ESC A 8 9 7 VIEW REC REL
16 17 18
26 27 28
29 30 31
32 33 34
36
39
37 38
35
19 20 21 22 23 24 25
7 8 9 10 40
4 5 6 11 41
1 2 3 12 42
0 15 14 13
43 44 45