9 Operation
24
9.2 Principle of operation
Operating
modes and
states
Levels
The instrument functions are arranged in four levels (see diagram on next
page):
- Measurement mode
- Operating level
- Parameter level
- Configuration level
Measurement
mode
1
(normal
operation)
The measurements are displayed at this level. Manual operation, hold and
calibration can be activated.
Operating
level
1
Setpoints, alarm tolerance, alarm delay and the limits for the limit comparators
are entered and displayed at this level.
Parameter
level
1
Controller parameters and other settings are programmed here.
The display of the individual parameters depends on the type of controller
action.
Configuration
level
1
The basic functions of the instrument are configured at this level.
1
Entries can only be made after the correct code word has been entered.
“Unlocking the levels”, page 27.
Measurement mode
(normal operation)
The process value and temperature are displayed.
Self-test
(after power-on)
All indicators light up;
the temperature display blinks.
Manual mode
The process value display continually switches
between the process value and the text “HAnd”, the
temperature is displayed.
Hold operation
The process value display continually switches
between the process value and the text “HoLd”, the
temperature is displayed.
Operation,
parameters,
configuration
The temperature display shows the parameters from
the various levels; the process value display shows
the corresponding values and codes.
Error
The temperature display continually switches
between the temperature and the error code (e.g.
F010),
