Basic Documentation

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Heat demand 03.10.2011
25.6 Display values
Heat and refrigeration demand are visible at the password level under:
Main menu > Aggregates > Heat and refrig demand >
Operating line Range Comments
Heat demand air handling 0...100% From RMU(A,U), RMS
Heat demand air retreatment 0...100% From RXB
Heat demand heating surface 0...100% From RXB
Heat demand -50…250°C From RMU (C), RMH
Heat demand relay On, Off Output Q
Heat demand modulating 0…100% Output (Y)
The following are visible at the service level:
Main menu > Aggregates > Heat and refrig demand >
Operating line Range Comments
Heat demand relay On, Off Output Q
Heat demand modulating 0…100% Output (Y)
25.7 Function check / wiring test
When testing wiring, the outputs for the function check can be switched directly.
Main menu > Commissioning > Wiring test > Outputs >
Operating line Comments
Heat demand relay ---, 0...100% (relay switches >= 1%)
Heat demand modulating ---, 0...100%
25.8 Troubleshooting
The supervision temperature sensor (section 25.3 "Supervision (basic types A, P,
U)") is also monitored:
When exiting the "Commissioning" menu, a check is made to see if the sensor is
connected. If no sensor is connected, there is no supervision.
If the sensor is connected but is missing later, a fault message appears (see
section 8.2 "Analog inputs"). The sensor fault is interpreted as "No heat available".
No. T
ext Effect
3201 No heat available Non-urgent message; must not be
acknowledged or *
Urgent message, with plant stop; must be
acknowledged and reset
101… [N.X1] sensor error Non-urgent message; must not be
acknowledged
* The effect depends on the setting "Impact of fault" (section 25.3)
Digital signals cannot be monitored.
Purpose
Settings
Fault status messages
Note