KEPCO BOP-GL 1KW Operator Manual Firmware Ver.3.05 and higher - Manual (Page 32)

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BOP-1K-GL 022814
1.5.4 SAVING AND RECALLING SETTINGS
The BOP offers 99 memory locations that can be used to store a set of operating parameters for
later use. For each location, the user can store operating mode, output on/off, Main channel ref-
erence type and value, and protection reference type and value. The stored settings can then
be recalled to quickly program the unit to the predetermined setting. The settings stored in one
of the locations (1 to 15 only) can be programmed to be restored automatically upon power-up
using switch S3 (see Table. 2-2). Refer to PAR. 3.5.7 for further details.
1.5.5 EXTERNAL REFERENCE (ANALOG CONTROL)
An external reference, provided through the rear I/O analog port connector (see Table 2-11), can
be used to control the output of the BOP. The external reference can be attenuated by the digital
controls (see PAR. 3.4.1.2) so the unit operates with a lower amplification factor. In addition, the
BOP can limit its output based on the user-configurable limits so that, in the event of a failure in
the external reference, the devices connected to the output are protected. Refer to PAR. 3.3.10
for further details on using external signals to control the output.
1.5.6 EXTERNAL LIMITS
When the unit is controlled by an external reference, the protection limits can also be controlled
by analog signals that are digitally calibrated. The BOP samples the limit channel inputs and
applies the proper limit levels at variable rate (5 to 100 milliseconds), alternately sampling the
positive and negative limits. The external limit inputs are hardware-protected against overvolt-
age. Refer to PAR. 3.4.2
1.5.7 USER-DEFINED VOLTAGE/CURRENT MAXIMUM VALUES (SOFTWARE LIMITS)
The BOP output can be programmed not to exceed user-defined values. For example, the BOP
36-28GL, which has a maximum capacity of ±36V, ±28A, can be limited to +30V, –10V, +5A, -1A
for working with circuitry that might be damaged by higher levels. Once the limits are set, values
exceeding the limit values will not be accepted, including external references and protection lim-
its. Refer to PAR. 3.3.5.
1.5.8 PARALLEL AND SERIES CONFIGURATIONS
Identical BOP units may be configured in series or parallel. If a series or parallel configuration is
enabled, communication between the master BOP and those configured as slave units occurs
via the BITBUS. Refer to PAR. 2.8 for further details.
1.5.9 ENERGY RECUPERATION
The BOP is a four-quadrant device as shown in Figure 1-3. Operating as a source, it delivers
energy into a passive load, and as a sink it operates as an electronic load, absorbing and dissi-
pating energy from an active load. To minimize energy dissipation, the BOP employs energy
recuperation, where energy sinked from an active load is passed backwards through the output
circuit and the bidirectional input power factor correcting circuit to the a-c power lines, where it
becomes available for general reuse. This technology allows high power levels using switch-
mode technology while maintaining high efficiency and reduced size and weight.