TDK Lambda | Z+Low Voltage User Manual

7.10.4 Checksum The usermay optionally add a checksumto the end of the command. The checksum is ”$”followed by two hex characters. If a command or a query has checksum, the response will also have one. There is no CR between the command string and the ”$” sign.

7.10.5 SCPI Requirements The power supply conforms to the following SCPI requirements: 1. SCPI common commands.

2. SCPI Command Tree. 3 Subsystem commands. 4. The ROOT level. 5. The power supply is powered On

6. A device clear (DCL) is sent to the power supply 7. The SCPI interface encounters a root specifier (:)

8. Questionable Status Register (QSR), Condition, Event, Enable 9. Operation Status Register (OSR), Condition, Event, Enable 10. Status Byte Register (SBR)

11. Standard Event Status Register (SESR) 12. Using the MIN and MAX Parameters. 13. Suffix and Multipliers. 14. Boolean data. 1 | 0 or ON | OFF

7.10.6 SCPI Command Hierarchy SCPI is an ASCII-based command language designed for use in test andmeasurement equipment. The command structure is organized around common roots, or nodes, which are the building blocks of SCPI subsystems. An example of a common root is OUTPut, and some of the commands that reside in the OUTPut subsystem are:

OUTPut

[:STATe] :PON

[:STATe]

:PROTection

:CLEar :FOLDback

[:MODE] A colon (:) is used to separate a command keyword from a lower-level keyword.

7.10.7 Header Headers are instructions recognized by the power supply. Headers (which are sometimes known as ”keywords”) may be either in long or short form.

Long form Short form

The header is completely spelled out, such as VOLTAGE, STATUS, and DELAY The header has only the first three or four letters, such as VOLT, STAT, and DEL.

The SCPI interface is not sensitive to case. It will recognize any case mixture, such as TRIGGER, Trigger, TRIGger. Short form headers result in faster program execution.

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