KEPCO KLR SERIES, Руководство разработчика

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1-4
KLR-DEV 060713
NOTES: 1. When programming sequential voltage levels, it is important to set the Overvoltage
to accommodate the highest voltage of the sequence. Otherwise, when going from
higher to lower voltage levels, the overvoltage protection will trip and shut down the
unit because the overvoltage setting registers faster than the power supply can
attain the lower voltage.
2. To operate the internal relay using the LIST commands, first configure the internal
relay to LIST using the UTIL menu from the front panel (see KLR User Manual).
3. The message
dLST
appears in the front panel status display while a LIST program
is running.
4. Removing the unit from remote digital programming mode will immediately termi-
nate a running LIST program.
5. The LIST capability is disabled for master /slave configurations and all LIST com-
mands will generate error message -221,”Configuration conflict.”
1.2.7 STATUS
The KLR status system consists of the standard register configuration as defined by the IEEE
488.2 and SCPI standards. This configuration allows the errors to be reported and causes inter-
rupts to be sent to the computer. The drivers provide the ability to set and clear these registers
but the interrupt functionality is not supported by the drivers. Using interrupts requires special
programming techniques that are environment-specific. See PAR. 1.2.7.1 through 1.2.7.5 for
details on the process required to implement this in a VISA environment.
The serial poll response of the KLR power supply provides summary bits of the status and error
reporting system. (The simplest status report is the “command valid” reporting and data avail-
ability. The successful decoding of a command string generates no error and is indicated by the
bit 3 of the serial poll response being a zero.) The setting of bit 4 in the status byte indicates
data is available to the controller in response to a command query message.
1.2.7.1 STATUS REPORTING STRUCTURE
The status reporting of the KLR uses four status register sets, illustrated in Figure 1-1. These
register sets are the Questionable, Operation, Event Status and Status Byte register sets. The
Questionable and Operation registers are 16 bit registers whose inputs are unique to each
instrument, while the Event Status and Status Byte registers are 8 bit registers with standard
inputs defined by IEEE 488.2. Each of these four register sets is comprised of event and enable
registers, with the Questionable and Operation sets adding condition and transition registers.
The Questionable and Operation condition registers hold unlatched events reported in real-time
by the instrument, viewable at any time using the appropriate query. The contents of the Ques-
tionable and Operation condition registers are latched in the corresponding event registers,
which hold records of specific event occurrences as determined by the accompanying transition
register; for KLR, all transition register bits are configured to record low-to-high (0 to 1) bit states
only, so that a 1 in the condition register is always stored as a 1 in the event register. Since the
event register bits are reset when read, the event register provides a record of changes in status
since the last time the event register was read.
For all four register sets the contents of each event register is gated by an accompanying
enable register. The user must set the corresponding enable bit value to one (high) in order to
include the specific event bit in the reported status.