Fluke 54200, User Manual

Page: 222 / 386

54200
Users Manual
6-14
Service Request (SRQ) and Status Registers
A Service Request will be generated if one or more bits of the 'Status Byte Register' are
set to 1 and if the corresponding bits are enabled by the 'Service Request Enable Register'
(IEEE-488 Interface only). The controller asks the contents of the 'Status Byte Register'
in 'Serial Poll Mode.'
Table 6-1. Fluke 54200 'Status Byte Register'
Bit Function Decimal Value
0
1
2
3
4
5
6
7
not used
message available (MAV)
bit of the ‘Standard Event Status Register’ high
request for service (RSQ)
not used
1
2
4
8
16
32
64
128
To get the information using Service Request that bits of the 'Standard Event Status
Register' are set, those bits must have been enabled by *ESE, and bit 5 of the 'Status
Byte Register' must have been enabled by *SRE.
Direct readout without Service Request is possible for the IEEE-488 as well as for the
RS-232 Interface by using the *ESR? query for the 'Standard Event Status Register' and
by the *STB? query for the 'Status Byte Register.'