3-84
BOP HIPWR 091719
3.6.7.1
STATUS REPORTING STRUCTURE
The status reporting of the BOP uses four status registers, illustrated in Figure 3-29. These reg-
isters are the Questionable, Operation, Standard Event Status and Status Byte registers. The
Questionable and Operation registers are 16 bit registers and the Standard Event Status and
Status Byte registers are 8 bits. These four registers are referred to as condition registers. Each
of the four condition registers is associated with two related registers: an event register which
holds unlatched events reported in real-time by the instrument and is cleared by reading the
register, and an enable register which allows the contents of the event register to be passed
through to set the associated condition register.
A zero to one transition of a condition register is added to the event register. Reading an event
register clears all of the bits found in the event register. If any bits are set in an event register,
the following condition register bit is then set. For example, if the STAT:QUES:ENB (enable) reg-
ister has bit 0 set and a voltage error is detected, the event registers bit 0 is set. The 1 in the
event register causes bit 3 of the status byte to be asserted. The Status Byte register is ANDed
with the Service Request Enable register for all bits except bit 6. The result is placed in bit 6 of
the Service Request register. If bit 6 is a 1 (true), it causes the power supply to assert the SRQ
line to the host controller.
Figure 3-29 also shows that if the error/event queue is not empty, bit 3 is set in the Service
Request register and bit 4 indicates that a message is available in the output buffer.
3.6.7.2
OPERATIONAL STATUS REGISTER
The OPERational condition register contains conditions which are a part of the instrument’s nor-
mal operation. The definition of each of these bits (condition register) is as follows:
•
0 - Not Used — always zero.
•
1 - Settling — 1 indicates Measurement System is changing and MEAS commands are
less accurate (see PAR. 3.5.1.1).
•
2 through 4 - Not Used — always zero.
•
5 - Waiting for Trigger — 1 indicates the trigger system is enabled. If trigger source is
external and the trigger input goes low, the WTG will remain in a one condition until
after the trigger input goes high.
•
6 - Transient Armed — 1 indicates the transient function is enabled,
•
7 - Not Used — always zero.
•
8 - Constant Voltage — 1 indicates the instrument is in constant voltage mode.
•
9 - Transient Complete — 1 indicates transient has been completed. Not readable in
OPERation Status Condition register.
•
10 - Constant Current — 1 indicates the instrument is in constant current mode.
•
11 - Sample Complete — 1 indicates the sample has been completed.
•
12 - List Complete — 1 indicates the programmed list has been completed. Not readable
in OPERation Status Condition register.
•
13 - Not Used — always zero.
•
14 - List Running — 1 indicates the programmed list is in progress.
•
15 - Not Used — always zero.
Summary of Contents for BOP-ME 1KW
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Page 64: ...2 22 BOP HIPWR 091719 FIGURE 2 11 PARALLEL CONFIGURATION LOCAL SENSING TYPICAL...
Page 65: ...BOP HIPWR 091719 2 23 FIGURE 2 12 PARALLEL CONFIGURATION REMOTE SENSING TYPICAL...
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