Function Block "External Inputs; Operating Lines; Contact H2; Hours Run Counter - Siemens RVL470 Basic Documentation

15. Function block "External inputs"

15.1. Operating lines

15.2. Contact H2

15.3. Hours run counter

15.4. Software version

15.5. Identification number of room unit

15.6. Radio clock, elapsed time since last reception

Siemens Building Technologies
Landis & Staefa Division
This function block handles the external inputs and several display functions.
Line Function, parameter
185 Effect when connection terminals H2–M are linked
186 Demand for heat when connection terminals H2–M
are linked
194 Hours run counter
195 Controller's software version
196 Identification code of room unit
Radio clock, elapsed time since last reception
197
For details, refer to section 14. Function block "Contact H2".
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).
The controller displays the software version in use.
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).
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
Basic Documentation RVL470
Function block "External inputs"
Unit Factory Range
setting
0 0 / 1
°C 70 0...140
Display function
Display function
Display function
Display function
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