Status Byte Definitions - Stanford Research Systems SR850 User Manual

SR850 DSP Lock-In Amplifier
INTERFACE
*RST
*IDN?
LOCL(?) {i}
OVRM (?) {i}
TRIG
STATUS
*CLS
*ESE (?) {i} {,j}
*ESR? {i}
*SRE (?) {i} {,j}
*STB? {i}
*PSC (?) {i}
ERRE (?) {i} {,j}
ERRS? {i}
LIAE (?) {i} {,j}
LIAS? {i}

STATUS BYTE DEFINITIONS

SERIAL POLL STATUS BYTE
bit name usage
0 SCN No data is being acquired
1 IFC No command execution in progress
2 ERR Unmasked bit in error status byte set
3 LIA Unmasked bit in LIA status byte set
4 MAV The interface output buffer is non-empty
5 ESB Unmasked bit in standard status byte set
6 SRQ SRQ (service request) has occurred
7 Unused
STANDARD EVENT STATUS BYTE
bit name usage
0 INP Set on input queue overflow
1 Unused
2 QRY Set on output queue overflow
3 Unused
4 EXE Set when command execution error occurs
5 CMD Set when an illegal command is received
6 URQ Set by any key press or knob rotation
7 PON Set by power-on
page description
6-26 Reset the unit to its default configurations.
6-26 Read the SR850 device identification string.
6-26 Set (Query) the Local/Remote state to LOCAL (0), REMOTE (1), or LOCAL LOCKOUT (2).
6-26 Set (Query) the GPIB Overide Remote state to Off (0) or On (1).
6-26 Software trigger command. Same as trigger input.
page description
6-27 Clear all status bytes.
6-27 Set (Query) the Standard Event Status Byte Enable Register to the decimal value i (0-255).
*ESE i,j sets bit i (0-7) to j (0 or 1). *ESE? queries the byte. *ESE?i queries only bit i.
6-27 Query the Standard Event Status Byte. If i is included, only bit i is queried.
6-27 Set (Query) the Serial Poll Enable Register to the decimal value i (0-255). *SRE i,j sets bit i (0-
7) to j (0 or 1). *SRE? queries the byte, *SRE?i queries only bit i.
6-27 Query the Serial Poll Status Byte. If i is included, only bit i is queried.
6-27 Set (Query) the Power On Status Clear bit to Set (1) or Clear (0).
6-27 Set (Query) the Error Status Enable Register to the decimal value i (0-255). ERRE i,j sets bit i
(0-7) to j (0 or 1). ERRE? queries the byte, ERRE?i queries only bit i.
6-27 Query the Error Status Byte. If i is included, only bit i is queried.
6-27 Set (Query) the LIA Status Enable Register to the decimal value i (0-255). LIAE i,j sets
bit i (0-7) to j (0 or 1). LIAE? queries the byte, LIAE?i queries only bit i.
6-27 Query the LIA Status Byte. If i is included, only bit i is queried.
(6-28)
(6-29)
LIA STATUS BYTE (6-29)
bit name usage
0 RESRV Set when a RESRV overload is detected
1 FILTR Set when a FILTR overload is detected
2 OUTPT Set when a OUTPT overload is detected
3 UNLK Set when reference unlock is detected
4 RANGE Set when detection freq crosses 200 Hz
5 TC Set when time constant is changed
6 TRIG Set when unit is triggered
7 PLOT Set when a plot is completed
ERROR STATUS BYTE (6-30)
bit name usage
0 Prn/Plt Err Set when an printing or plotting error occurs
1 Backup Error Set when battery backup fails
2 RAM Error Set when RAM Memory test finds an error
3 Disk Error Set when a disk error occurs
4 ROM Error Set when ROM Memory test finds an error
5 GPIB Error Set when GPIB binary data transfer aborts
6 DSP Error Set when DSP test finds an error
7 Math Error Set when an internal math error occurs
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