ST2515 Operation Manual
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the soft key LOCAL. Execute the LOCAL command to undo LOCAL LOCKOUT.
REMOTE
Set the control mode as remote control.
SPOLL
The SPOLL (serial poll) command is set the bus address status byte. 8 bytes are used to
shield, read and judge the instrument operating status.
SERVICE REQUEST
When ST2515 requires the controller to execute a task, it will send out a SRQ service
request control signal. SRQ, deemed as an interruption, will inform the controller to
prepare the transmitted data or that errors exist on the instrument. As soon as ST2515
sends a SRQ service request signal, it will set the status byte to 6. 6 bytes are RQS
request service bytes and sometimes connects with serial poll to act as the status byte.
When ST2515 enables the SPOLL command, it will clear the RQS request service bit and
the SRQ string. Each bit in a status byte will enables a SRQ service request. User can
shield the status byte to judge which bit causes ST2515 to set SRQ. For details, see
“Status Byte”.
TRIGGER (GET)
Trigger bus command. This command can be sent to a selected device or all listener
devices. It is necessary to assign ST2515 as a listener device firstly and then set the
trigger mode as bus trigger mode. Finally send trigger data.
6.2.4
SCPI
(Standard
Commands
for
Programmable
Instruments)
SCPI is a new general command based on the IEEE488.2-1987 standard. (SCPI is the same as TMSL,
a system language for measurement testers adopted by HP.)
System for Component X
System for Component Y
BUS
Relative information for measurement tester
Common commands and query
Syntax and data structure
Remote control
D C B A A B C D
IEEE488.2
IEEE488.1 Standard
IEEE488.2
SCPI SCPI
Where:
Level D shows the instrument functions
Level C shows the common system functions
