System information

17-Nov-2014 G2T Programmers Guide Rev-A

*PSC? – returns the current value of PSC

*CLS – This clears the interface’s Last Error Registers, Event

Status Register and the Status Byte Register (except for

MAV, FLT and PSFLT) but not its queued responses. It has no

affect on the other interfaces. As a departure from the

standard, the Fault Queue is not affected. As a result, after

the command, MAV, FLT and PSFLT reflects the status of

their underlying conditions.

*RST – This command clears all the switchpoint routings in all

the modules. No other status registers are affected

6.1.8.1. Commands to Evaluate and Control Status (non 488.2)

The following commands are used to evaluate the status of

the device. They are in addition to IEEE 488.2 commands

and their functionality is not defined by that standard.

GET? 15 – returns the oldest entry in the Fault Queue and

will always be at least a three digit number. The last two

digits in the number are undocumented diagnostic codes.

The first digit(s) in the number and their meanings can be

referenced in the error code list. If the queue is empty it

returns 0. If there are entries in the queue, the FLT bit of SBR

is set. Reading the last entry causes the FLT bit to clear and

for MSS to be evaluated.

The following three read-only registers behave differently

from the others properties that can be read with the GET?

Query commands. Upon detecting an error of one of the

above types, its corresponding flag in the ESR is set and the

error is recorded in the register. (Any previous, unread error

is over-written.) At this point, the register can be read with

the GET? Query. Once the ESR is cleared or read (which

clears it), the Last Error Registers clear after the next time

they are read

GET? 4 – returns contents of the Last Query Error Register

GET? 16 – returns contents of the Last Execution Error

GET? 32 – returns contents of the Last Command Error