Operation Event Register Set - Lakeshore 335 User Manual

96 c 6: Computer Interface Operation
HAPTER
Model 335 Temperature Controller
7
Standard event
128
Status register
PON
*ESR?
(*ESR? reads and
AND
clears the register)
Standard event
7
Status enable register
128
*ESE, *ESE?
PON

6.2.5.2 Operation Event Register Set

The Operation Event Register reports the interface related instrument events listed
below. Any or all of these events may be reported in the operation event summary bit
through the enable register (FIGURE 6-3). The Operation Event Enable command
(OPSTE) programs the enable register and the query command (OPSTE?) reads it.
OPSTR? reads and clears the Operation Event Register. OPST? reads the Operation
Condition register. The used bits of the Operation Event Register are described as fol-
lows:
Processor Communication Error (COM), Bit (7): this bit is set when the main pro-
D
cessor cannot communicate with the sensor input processor
Calibration Error (CAL), Bit (6): this bit is set if the instrument is not calibrated or
D
the calibration data has been corrupted
Autotune Done (ATUNE), Bit (5): this bit is set when the Autotuning algorithm is
D
NOT active
New Sensor Reading (NRDG), Bit (4): this bit is set when there is a new
D
sensor reading
Loop 1 Ramp Done (RAMP1), Bit (3): this bit is set when a loop 1 setpoint ramp
D
is completed
Loop 2 Ramp Done (RAMP2), Bit (2): this bit is set when a loop 2 setpoint ramp
D
is completed
Sensor Overload (OVLD), Bit (1): this bit is set when a sensor reading is in the over-
D
load condition
Alarming (ALARM), Bit (0): this bit is set when an input is in an alarming state, and
D
the Alarm Visible parameter is on
6 5 4 3 2 1
64 32 16 8 4 2
Not Not Not
CME EXE QYE
used used used
AND
AND
AND
6 5 4 3 2 1
64 32 16 8 4 2
Not Not Not
CME EXE QYE
used used used
FIGURE 6-2 Standard event status register
– Bit
0
– Decimal
1
OPC – Name
OR
AND
To event summary
– Bit bit (ESB) of status
0
byte register
1
– Decimal
(see FIGURE 6-1)
OPC
– Name