132
132
132
132
in bit 4. Besides, bits are not latched in the summary registers. In
addition, to clear an event register will clear the according bits in the
status byte summary register. And to read all messages in the output
buffer, including all pending queries, will clear the message available bit.
The following list shows the definition of each bit.
Bit
Decimal
Value
Definition
0.
Not Used
1
Set to 0.
1.
Not Used
2
Set to 0.
2.
Not Used
4
Set to 0.
3.
Questionable Data
8
One or more bits are set in the questionable data register (Bits have
to be “enabled” in enable register).
4.
Message Available
16
Data in the DMM’s output buffer is available.
5.
Standard Event
32
One or more bits are set in the Standard Event Register (Bits have to
be “enabled” in enable register).
6.
Request Service
64
The DMM is requiring service (Serial Poll).
7.
Not Used
128
Set to 0.
On the other hand, there are some conditions that users have to note.
The following conditions will clear the summary register.
Users execute a *CLS (clear status) command.
To query the standard event and questionable data registers will
clear only the separate bits in the summary register.
The following conditions will clear the enable register.
1.
Users turn on the power, and have set the DMM previously by using
the *PSC 1 command.
2.
Users execute a *SRE 0 command.
※
Note: If you have set the DMM previously by using *PSC 0, the status
byte enable register won’t be cleared at power-on.
How to use SRQ (Service Request) and Serial Poll
You have to set the bus controller to repond to the IEEE-488 SRQ and
interrupt to use this capability. Use the status byte enable register (SRE)
Содержание M3500
Страница 6: ......
Страница 10: ......
Страница 12: ...w a r ...
Страница 13: ......
Страница 14: ......
Страница 16: ......
Страница 29: ......
Страница 37: ......
Страница 41: ......
Страница 42: ...In Short Condition ...
Страница 43: ......
Страница 44: ......
Страница 109: ...104 104 104 104 651 Panel Program Checksum Error The checksum from the panel is incorrect ...
Страница 110: ...K U S A M ME C O ...
Страница 148: ...K U S A M M E C O K U S A M M E C O ...
Страница 155: ...K U S A M M E C O ...
Страница 163: ...158 158 158 158 m_nCount 0 m_defaultRM_usbtmc 0 FreeLibrary hUSBTMCLIB hUSBTMCLIB NULL return ...
Страница 164: ......