2308-900-01 Rev. A / July 2008
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Section Topics
7-9
Model 2308 Portable Device Battery/Charger Simulator User’s Manual
Section 7: Status Structure
•
Bit B5, command error (CME)
- Set bit indicates that a command error has
occurred. Command errors include:
– EEE-488.2 syntax error - power supply received a message that does not follow the
defined syntax of the IEEE-488.2 standard.
– Semantic error - power supply received a command that was misspelled or received an
optional IEEE-488.2 command that is not implemented.
– The instrument received a group execute trigger (GET) inside a program message.
•
Bit B6, user request (URQ)
- Set bit indicates that the LOCAL key on the power supply
front panel was pressed.
•
Bit B7, power ON (PON)
- Set bit indicates that the power supply has been turned off and
turned back on since the last time this register has been read.
Figure 7-3
Standard event status
Operation event status
The used bits of the operation event register (shown in
Figure 7-4
) are described as follows:
•
Bit B1, voltage protection channel #1 (VPT1)
- Set bit indicates that the battery channel
(#1) is in voltage protection mode. In this mode, the output has been turned off and the front
panel displays “VPT” (battery channel only - for the charger channel, see Bit 2). If the
display mode is set to DUAL V AND I then, the VPT message will not appear on the display.
•
Bit B2, voltage protection channel #2 (VPT2)
- Set bit indicates that the charger channel
(#2) is in voltage protection mode. In this mode, the output has been turned off and the front
panel displays “VPT” (charger channel only - for the battery channel, see Bit 1). If the
display mode is set to DUAL V AND I then, the VPT message will not appear on the display.
•
Bit B3, current limit #1 (CL1)
- Set bit indicates that the battery channel’s (#1) output is in
current limit. This bit clears when the instrument is no longer in current limit (battery channel
only — for the charger channel, see Bit 7).
PON
(B7)
CME
(B5)
EXE
(B4)
DDE
(B3)
QYE
(B2) (B1)
OR
Standard Event
Register
Standard Event
Enable Register
PON = Power On
URQ = User Request
CME = Command Error
EXE = Execution Error
DDE = Device-Dependent Error
QYE = Query Error
OPC = Operation Complete
& = Logical AND
OR = Logical OR
&
&
&
&
&
OPC
(B0)
&
128
(2
7
)
32
(2
5
)
16
(2
4
)
8
(2
3
)
4
(2
2
)
1
(2
0
)
Decimal
Weights
URQ
(B6)
(B15 - B8)
PON
(B7)
CME
(B5)
EXE
(B4)
DDE
(B3)
QYE
(B2) (B1)
OPC
(B0)
URQ
(B6)
(B15 - B8)
*ESR?
*ESE <NRf>
*ESE?
64
(2
6
)
To ESB Bit
of Status Byte
Register
&
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