Siemens Building Technologies
Basic Documentation RVL470
CE1P2522E / 30.03.2000
Landis & Staefa Division
Function block "External inputs"
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15. Function block "External inputs"
This function block handles the external inputs and several display functions.
15.1. Operating lines
Line
Function, parameter
Unit
Factory
setting
Range
185
Effect when connection terminals H2–M are linked
0
0 / 1
186
Demand for heat when connection terminals H2–M
are linked
°C
70
0...140
194
Hours run counter
Display function
195
Controller's software version
Display function
196
Identification code of room unit
Display function
197
Radio clock, elapsed time since last reception
Display function
15.2. Contact H2
For details, refer to section 14. Function block "Contact H2".
15.3. Hours run counter
The number of controller operating hours are displayed. Whenever operating voltage is
present, the RVL470 counts the number of hours.
The maximum reading is limited to 500,000 hours (57 years).
15.4. Software version
The controller displays the software version in use.
15.5. Identification number of room unit
Based on the number shown in the display, the type of room unit used can be identified.
The types of room units that can currently be used with the RVL470 carry the following
numbers:
82 = QAW50
83 = QAW70
The RVL470 ignores room units that cannot be used (e.g. the QAW20) and generates a
fault status signal (error code 62).
15.6. Radio clock, elapsed time since last reception
If a radio clock receiver is connected to the data bus, the RVL470 can receive the radio
clock signals via data bus. On operating line 197, it is possible to see how much time
has elapsed since the last correct time telegram was received.
Display --:-- has the following meaning:
•
No radio clock receiver connected
•
Controller has no data bus address
•
Connection interrupted
