ITech IT8700 Series Programming Guide

Remote Control
Copyright © Itech Electronic Co., Ltd. 4
computer (COM1, COM2.etc.).
1.1.3 USB-TMC Capabilities of the Electronic Load
All electronic load functions are programmable over the USB.
The USB488 interface capabilities of the electronic load are described follow:
 The interface is a 488.2 USB488 interface.
 The interface accepts REN_CONTROL, GO_TO_LOCAL, and
LOCAL_LOCKOUT requests.
 The interface accepts the MsgID = TRIGGER USBTMC command
message and forwards TRIGGER requests to the Function Layer.
The USB488 device capabilities of the electronic load are described follow:
 The device understands all mandatory SCPI commands.
 The device is SR1 capable
 The device is RL1 capable
 The device is DT1 capable
1.2 Programming the Status Registers
You can use status register programming to determine the operating condition
of the electronic load at any time. For example, you may program the electronic
load to generate an interrupt (assert SRQ) when an event such as a current
protection occurs. When the interrupt occurs, your program can then act on the
event in the appropriate fashion.
Table defines the status bits. Figure shows the status register structure of the
electronic load. The Standard Event, Status Byte, and Service Request Enable
registers and the Output Queue perform standard GPIB functions as defined in
the IEEE 488.2 Standard Digital Interface for Programmable Instrumentation.
The Operation Status and Questionable Status registers implement functions
that are specific to the electronic load.
Bit
Signal
Meaning
0
5
CAL
WTG
Operation Status Group
Calibrating. The electronic load is computing new calibration constants
Waiting
. The electronic load is waiting for a trigger
0
1
VF
OC
Channel Status Group
Voltage Fault. Either an overvoltage or a reverse voltage has occurred. This bit
reflects the active state of the FLT pin on the back of the unit. The bit remains set
until the condition is removed and INP:PROT:CLE is programmed.
Over current. An over-current condition has occurred. This occurs if the current
exceeds 102% of the rated current or if it exceeds the user-programmed current
protection level. Removing the over-current condition clears the bit. If the condition
persists beyond the user programmable delay time, PS bit is also set and the input is

ITech IT8700 Series Specifications

General

Brand	ITech
Model	IT8700 Series
Category	Test Equipment
Language	English