Sequoia Series 11
the information is beyond the need of most programmers, it can serve to clarify the terms
used in this guide and related documents.
• ANSI/IEEE Std. 488.2-1987 IEEE Standard Codes, Formats, Protocols, and Common
Commands. Recommended as a reference only if you intend to do fairly sophisticated
programming. Helpful for finding precise definitions of certain types of SCPI message
formats, data types, or common commands.
The above two documents are available from the IEEE (Institute of Electrical and Electronics
Engineers), 345 East 47th Street, New York, NY 10017, USA.
1.3 Introduction to Programming
This section provides some general information regarding programming instrumentation and available
interface types.
1.3.1 IEEE-488 Capabilities of the Power Source
All power source functions are programmable over the Ethernet (LAN), USB, RS-232C, or optional
IEEE-488 interface bus.
IEEE-488 Address
The power source operates from a single IEEE-488 address that may be set from the front panel or
programmatically through the IEEE-488 bus. Care must be used when setting the IEEE-488 address
programmatically since the next statement sent to the source must reflect the new address.
1.3.2 USB Capabilities of the Power Source
All power source functions are programmable over the USB interface. Some capabilities that support
the IEEE-488 interface such as ATN, GET, and SRQ interrupts do not apply to the USB interface. The
USB interface operates internally at a fixed baud rate of 460800 baud, but USB 2.0 burst transfer rates
are supported. To set up the USB interface on the PC, refer to section 3.4, “USB Interface”.
The USB interface may be used to install the updated firmware for the controller if needed. Firmware
updates and a Flash Loader utility program and instructions are available from the AMETEK
Programmable Power website for this purpose. (www.programmablepower.com).
Multiple USB connections to the same PC:
The Windows driver used to interface to the power source’s USB port emulates a serial com port. This
virtual com port driver cannot differentiate between multiple units so, the use of more than one power
source connected to the same PC via USB is not recommended. The use of the GPIB interface is
recommended for these situations.
1.3.3 LAN Capabilities of the Power Source
All power source functions are programmable over the LAN (Ethernet) interface. Some capabilities
that support the IEEE-488 interface such as ATN, GET and SRQ interrupts do not apply to the LAN
interface. The LAN interface operates internally at a fixed baud rate of 460800 baud but autodetection
of 10Base-T, 100Base-T, and 1000Base-T is supported. To set up the LAN interface on a PC, refer to
section 3.5, “LAN Interface Option”.
The LAN interface may be used to install the updated firmware for the controller if needed. Firmware
updates and a Flash Loader utility program and instructions are available from the AMETEK
Programmable Power website for this purpose. (www.programmablepower.com).
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