General bus commands ............................................................ 6-11
REN (remote enable) ........................................................ 6-11
IFC (interface clear) .......................................................... 6-11
LLO (local lockout) .......................................................... 6-11
GTL (go to local) .............................................................. 6-12
DCL (device clear) ............................................................ 6-12
SDC (selective device clear) ............................................. 6-12
GET (group execute trigger) ............................................. 6-12
SPE, SPD (serial polling) .................................................. 6-12
Programming syntax ................................................................ 6-12
Command words ............................................................... 6-12
Commands and command parameters ....................... 6-13
Query commands .............................................................. 6-14
Case sensitivity ................................................................. 6-14
Leading colon .................................................................... 6-15
Long-form and short-form versions .................................. 6-15
Short-form rules ................................................................ 6-15
Program messages ............................................................. 6-16
Single command messages ........................................ 6-16
Multiple command messages ..................................... 6-16
Command path rules .................................................. 6-17
Using common and SCPI commands
in the same message .............................................. 6-17
Program message terminator (PMT) ......................... 6-17
Command execution rules ......................................... 6-17
Response messages ........................................................... 6-18
Sending a response message ...................................... 6-18
Multiple response messages ...................................... 6-18
Response message terminator (RMT) ....................... 6-18
Message exchange protocol .............................................. 6-18
7 Status Structure
Overview .................................................................................... 7-2
Status byte and SRQ ........................................................... 7-2
Status register sets ............................................................... 7-2
Queues ................................................................................. 7-2
Clearing registers and queues ..................................................... 7-4
Programming and reading registers ........................................... 7-5
Programming enable registers ............................................. 7-5
Reading registers ................................................................. 7-6
Status byte and service request (SRQ) ....................................... 7-7
Status byte register .............................................................. 7-8
Service request enable register ............................................ 7-9
Serial polling and SRQ ....................................................... 7-9