Chauvin Arnoux STATOP 4850 Manual De Instrucciones página 32

3.6.2. Access to manual mode
This routine makes it possible to operate the controller in manual mode.
Manual control is used :
- to find process values
- in case of controller breakdown
!
Manual control being an open loop, the temperature risks reaching dangerous values for the installation.
When Hand Cont is displayed, press
hot) in display . Display
Press again to display in the same way the percentage of cold output, preceded by the letter c (cold). This supposes that alarm
A2 has been configured for hot-cold control ( A2.SF = Cool ).
To enter manual mode, and modify the output percentages, press the
on manual, which is demonstrated by the flashing of the measured value, in display . The percentage of output is modified by means
of keys or , between 0 and 100%.
On P-I-D mode, the percentage of control corresponds to the cyclical ratio between the active and inactive states of the control output.
Thus for example, for a cycle time of 10 seconds ( CYC = 10 s) and a manual control of 40% for OUT1 ( h 40 ), the behaviour of the
output will be as follows :
N.B. : In ON-OFF mode, manual control can not be used and the error message oPEr appears.
3.6.3. Minimum and maximum
This routine allows checking of the stability of the process. The minimum and maximum values measured at the input are continually
read and stored in the memory of the controller.
When rEAd/PEAk is displayed, press
( Lo.Pv ). To re-initialise the memory, press the key for more than 4 seconds when the parameter is displayed.
3.6.4. FAIL-SAFE configuration
This routine is used to define the behaviour of the OUT1, A1 and A2 outputs in case of control incident. When FAIL-SAFE is visible
on the display, press to select the required output. Then press the
than 4 s) on is necessary to record the new configuration.
3.6.5. Locking the access
This routine is used to prohibit the modification of the parameters classed at a given level (see Ch 3.6.6.).
When LoCK / PArA is displayed, press the
status of this level ( LoCK = lock, FrEE = free access).
To record the new configuration, press
N.B.: As the parameters classed at level 3 are not accessible, locking of this level is not offered.
3.6.6. Selection of levels of access
It may be found that the number of programming stages is too high. In most applications, many parameters are unused, and lengthen
the access time to the necessary parameters.
The STATOP 4850 controller allows this restriction be to overcome. Each parameter can be classed in one of the four internal levels
(Level 0, Level 1, Level 2 and Level 3). The parameters of a level n will be accessible before those of level n+1.
In addition, the parameters of LEVEL 3 will never be visible on the display. The user can therefore class at this level the parameters
that are of no use to him and class at LEVEL 0 the parameters that he uses frequently.
To allocate the level of each parameter, following the synopsis of Ch 3.6.1, press the
to obtain ConF/LEvL , then only press
to display the percentage of control on the OUT1 output, preceded by the letter h (for
indicates the measured value.
Ouput
4s
On
Off
to display the maximum reached ( hi.Pv ) . Press
key to select the required level ( LEvL = 0, 1 or 2). Then press
for more than 4 s.
to obtain the parameter required.
key for more than 4 seconds. The controller then works
10s
6s
or keys to obtain the required state. A long press (greater
32
Time
again to display the minimum
or
and keys as many times as is necessary
to modify the