Siemens RVL481 - 27 Function Block Locking Functions; Operating Line; Locking the Settings on the Software Side; Locking the Settings for District Heat on the Hardware Side

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Siemens Heating and D.h.w. Controller RVL481 CE1P2541en
Building Technologies 27 Function block "Locking functions" 20.05.2008
27 Function block "Locking functions"
On the software side, all settings can be locked to prevent tampering.
Also, the settings required for district heat applications can be locked on the hardware
side.
27.1 Operating line
Line Function, parameter Factory setting (range) Unit
248 Locking of settings 0 (0…2)
27.2 Locking the settings on the software side
On operating line 248, the settings made on the controller can be locked on the soft-
ware side. This means that the settings made can still be called up on the controller,
but cannot be changed. Locking may comprise:
• All settings
• Only the settings required for the district heat parameters
The settings can be changed via the bus.
The procedure is the following:
1. Press buttons
and together until appears in the display.
2. Press buttons , , and , one after the other.
3. Now, operating line 248 appears in the display. The following locking choices are
available:
0 = No locking
1 = All settings are locked
2 = Only the settings required for the district heat parameters are locked (operating
lines 101 to 117)
After locking all settings, the following setting elements remain operative:
• The buttons for selecting the operating lines
• The Info button
No longer operative will be:
• The buttons for the readjustment of values
• The bar for changing the basic setting of the heating curve
• The knob for readjustment of the room temperature
• The operating mode buttons
• The manual mode button
27.3 Locking the settings for district heat on the
hardware side
The settings for district heat (operating lines 101 through 117) can be locked by bridg-
ing terminals H3
−M. This locking has priority over locking on the software side. If lock-
ing is made on the hardware side, settings via the bus can no longer be changed either.
To make the link across H3–M inaccessible, the controller can be sealed to prevent its
removal.
Refer to chapter “29 Handling".