Figure 12-3 Service Request Enable Register - Keithley 2182 User Manual

Description
Use the *SRE command to program the Service Request Enable Register. Send this command
with the decimal equivalent of the binary value that determines the desired state (0 or 1) of each
bit in the register. This register is cleared on power-up.
This enable register is used along with the Status Byte Register to generate service requests
(SRQ). With a bit in the Service Request Enable Register set, an SRQ occurs when the
corresponding bit in the Status Byte Register is set by an appropriate event. For more
information on register structure, see the information presented earlier in this section.
The Service Request Enable Register is shown in
of each bit is included in the illustration. The sum of the decimal weights of the bits that you
wish to set is the value that is sent with the *SRE command. For example, to set the ESB and
MAV bits of the Service Request Enable Register, send the following command:
*SRE 48
Where: ESB (bit B5)
MAV (bit B4) = Decimal
<NRf>
The contents of the Service Request Enable Register can be read using the *SRE? query
command.
Figure 12-3
Service request enable register
Bit Position
B7
Event
OSB
128
Decimal Weighting
7
(2 )
Value
0/1
Value: 1 = Enable Service
Request Event
0 = Disable (Mask)
Service Request Event
Figure
= Decimal 32
16
= 48
B4 B3
B6 B5 B2
ESB MAV QSB EAV
32 16 8 4
5 4 3 2
(2 ) (2 ) (2 ) (2 )
0/1 0/1 0/1 0/1
Events : OSB = Operation Summary Bit
ESB = Event Summary Bit
MAV = Message Available
QSB = Questionable Summary Bit
EAV = Error Available
MSB = Measurement Summary Bit
Common Commands
12-3. Notice that the decimal weight
B0
B1
MSB
1
0
(2 )
0/1
12-13