KEPCO KIT 219-0452, BIT 4886 Firmware Upgrade for BOP 100-1M-4886-25968 - Manual (Page 9)

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B. REPLACE PAR. 5.2, 5.2.1, AND 5.2.2 AS FOLLOWS:
5.2 ENHANCED OPERATION
The following paragraphs describe options that will permanently modify the behavior of the BIT 4886 and
associated BOP power supply. Although these options use SCPI commands, they are not intended to be
used during normal programming of the BOP output.
The commands described in the following paragraphs affect only RAM variables. The power up state of the
variables is retrieved from the FLASH EEPROM. The command MEMORY:UPDATE can be used to copy
this RAM information to the FLASH EEPROM. The WINDOW variable is stored using the command
MEM:UPDATE SHUTDOWN and the other variables, including the DIAG:SAV command, use the command
MEMORY:UPDATE INTERFACE
5.2.1 ERROR DETECTION
The BIT 4886 card has the ability to alter the way the unit responds to detection of load and settings errors.
The default behavior is for the BIT 4886 to measure the main channel and verify that it is within the speci-
fied channel tolerances of the BOP, setting the appropriate bits in the Status Questionable register. This
default behavior is established by the SYST:SEC:IMM command and the factory default window of 32
LSBs.
The default behavior can be modified using the DIAG:ERR, DIAG:ONL, DIAG:OFFL AND DIAG:WIN com-
mands listed in Table 5-1 so that device errors are generated for conditions such as window exceeded, out-
put current limit at setting and output current exceeding a hard limit. These errors can also be used to force
the unit to go to an output off state upon detecting the errors. The behavior is altered, the new setting is
stored in RAM and it remains in effect until a power off/power on cycle. The settings can be saved for power
up by sending the MEMORY:UPDATE SHUTDOWN command. Error responses are listed in Table 5-1.
5.2.2 LIMIT CHANNEL CONTROL
The unit supports three limit settings for the output off state. The standard configuration is for the limits to be
set to the minimum levels which causes the output not to vary beyond the BOX limits defined in the BOP
manual. The limits can also be set to maximum or 110% of rated voltage or current. This is useful for battery
operation. These limit settings are established by the DIAG:OUTPut command. With other types of devices,
it is possible to set the output off limit channels to be at any level by using the DIAG:OFFLimit commands to
establish the limit for the output off state. DIAG:OUTP n
H
(see Table 5-1) controls the limit DAC values
when the output is set to OFF. n = 0 is the default. This sets both voltage and current limit channels to 0
when the output is off. n = 1 sets voltage limit to maximum when the output is off. n = 2 sets the current limit
to the maximum when the output is off. Bits 2 and 3 of the hex character allow the DIAG:OFFLimit com-
mands to establish a specific voltage limit and current limit, respectively, when the output is off. Bits 0 and 2
or bits 1 and 3 should not be set at the same time since the maximum setting will override the value speci-
fied by DIAG:OFFLimit. The SYST:SEC:IMM command sets DIAG:OUTP n = 0. The variables are stored in
non-volatile EEPROM by the command MEMORY:UPDATE INTERFACE.