Keithley 7999-6, Инструкция по эксплуатации

Страница: 46 / 89

Operation 3-19
*ESE <NRf> — Event Enable
Program the standard event enable register
*ESE? —Event Enable Query
Read the standard event register
Parameter <NRf> = 0 Clear register
1 Set OPC(B0)
4 Set QYE (B2)
8 Set DDE(B3)
16 Set EXE(B4)
32 Set CME(B5)
64 Set URQ(B6)
128 Set PON(B7)
255 Set all bits
Use the *ESE command to program the Standard Event Enable Register. This command is
sent with the decimal equivalent of the binary value that determines the desired state (0 or 1) of
the bits in the register. This register is cleared on power-up.
This register is used as a mask for the Standard Event Register. When a standard event is
masked, the occurrence of that event will not set the Event Summary Bit (ESB) in the Status
Byte Register. Conversely, when a standard event is unmasked (enabled), the occurrence of that
event sets the ESB bit. For information on the Standard Event Register and descriptions of the
standard event bits, see the *ESR? command.
A cleared bit (0) in the enabled register prevents (masks) the ESB bit in the Status Byte Reg-
ister from setting when the corresponding standard event occurs. A set bit (1) in the enable reg-
ister allows (enables) the ESB bit to set when the corresponding standard event occurs.
The Standard Event Enable Register is shown in Figure 3-7 and includes the decimal weight
of each bit. The sum of the decimal weights of the bits that you wish to be set is the parameter
value that is sent with the *ESE command. For example, to set the CME and QYE bits of the
Standard Event Enable Register, send the following command:
*ESE 36
where: CME (bit B5) = 32
QYE (bit B2) = __4
<NRf> = 36
If a command error (CME) occurs, bit B5 of the Standard Event Status Register sets. If a
query error (QYE) occurs, bit B2 of the Standard Event Status Register sets. Since both of
these events are unmasked (enabled) the occurrence of any one of them causes the ESB bit in
the Status Byte Register to set. Read the Standard Event Status Register using the *ESE? query
command.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com