Controller functions
RES-445
Page 41
10.15
Disabling the Configuration menu
(Software revision 010 or higher)
It is possible to disable all changes to values/
parameters in the Configuration menu. This prevents
the controller configuration from being tampered with
by unauthorized persons.
The Configuration menu can be disabled or enabled by
pressing the "MENU" key for 2.0seconds while the
power-up message is displayed (after switching on the
controller,
!
section 10.2.1 "Power-up message" on
page 23). The display then shows a message
confirming that the disable function is active for
3.0seconds before returning to the home position.
The same message is also displayed for 5.0seconds
when you open the Configuration menu to indicate that
this menu is disabled.
You can still display all steps, values and
parameters even if the Configuration menu is
disabled. You are no longer allowed to enter or
change values, however.
The Configuration menu remains disabled until the
disable function is canceled again. To do so, repeat the
above procedure (press the "MENU" key for
2.0seconds while the power-up message is displayed).
The display then shows a message confirming that the
disable function has been canceled.
In the factory setting the Configuration menu is not
disabled.
10.16
Setting the display brightness
(VF display only)
(Software revision 019 or higher)
If the display is in the home position, the brightness of
the VF display (blue) can be set in 4 steps (25%, 50%,
75%, 100%) with the "UP" and "DOWN" keys.
The factory setting is 75%.
The life of the VF display can be prolonged by reducing
the brightness.
10.17
Undervoltage detection
Trouble-free operation of the temperature controller is
guaranteed within the line voltage tolerance range
specified in Kap. 6 „Technical data“ auf Seite 9.
If a line voltage which is less than the lower limit of the
permissible range occurs, the controller is switched to
a standby mode. No more heatsealing processes take
place and no more measuring impulses are generated.
The display changes to indicate this.
The main menu is displayed again, and operation is
resumed, when the input voltage returns to the
specified tolerance range.
The alarm relay (terminals 5+6) is only switched by an
undervoltage condition in controllers up to and
including software revision 002. The last valid
temperature value continues to appear at the analog
output (terminals 20+24).
The alarm relay in controllers with a higher software
revision number is not switched if an undervoltage
condition occurs. The standby mode is indicated by
0°C (corresponds to 0V) at the analog output.
Trouble-free operation of the controller is
only guaranteed within the specified input
voltage tolerance range. An external voltage
monitor must be connected to prevent defective
heatseals as a result of low line voltage.
!
!
