Event Registers; Table 3.4 Ldt-5900 Status Registers: Status Register 1 - ILX Lightwave LDT-5900 Series User Manual

3
C H A P T E R

Table 3.4 LDT-5900 Status Registers: Status Register 1

Bit Number
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

Event Registers

The Event Registers report the temperature controller and sensor events that
have occurred since power-on, or since the previous read of the Event Registers.
A host controller program must use the "EVENT?" query, to access these
registers. The EVENT? query will also clear the contents of the Event Registers.
The bits of the two 16-bit registers correspond to the bits in the Event Enable
Registers shown in Tables 3.5 and 3.6.
In most applications, the Event Registers are used in conjuncion with the Event
Enable Registers to alery an instrument controller on the GPIB bus that a certain
condition (i.e. Upper Temperature Limit) has occurred. The user should first set
the desired event bits in the Event Enable Registers using the "ENABLE:EVENT"
command. Then enable GPIB Service Request generation (see the *SRE
command in Chapter 4). The instrument will then generate a GPIB Service
Request (SRQ) when any of the specified conditions occur. Use the EVENT?
query to determine which event(s) caused the SRQ. The user must clear the
Event Registers with the EVENT? query to re-enable SRQ generation for the
nabled event(s).
52
LDT-5980/ 5948
R E M O T E O P E R A T I O N S
St a t us Report ing
Condition
RAC Measurement Complete
Reserved
Output On
Measurement Within Setpoint Tolerance
Measurement Out of Setpoint Tolerance
Reserved
Reserved
Reserved
Reserved
Internal PCB Temperature Over Limit
Invalid Calibration Data
DSP Reset
TEC Temperature Runaway
Reserved
-15V PCB Supply Out of Tolerance
Reserved
Decimal Value
1
2
4
8
16
32
64
128
256
512
1024
2048
4096
8192
16384
32768