Basic Documentation

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Sequence controller 03.10.2011
If a pump connected to this sequence is to remain active despite limitation, setting
value "Load-dependent OFF" must be set to 0% at the pump. Sequence limitation
does not limit a sequence down to 0%.
15.3.3 Troubleshooting
A check is made to see if a sensor is connected to the input when exiting the
commissioning menu. If the sensor is connected but missing later, a fault message
"Sensor error X.." is generated.
If there is no sensor, limitation is set inactive.
15.4 Sequence locking acc to OT
This function is used to lock individual sequences depending on the outside
temperature.
15.4.1 Activate function
This function is always active when the outside temperature is available.
If other influences simultaneously act on the sequence limitation controller, priority
order as described in section 11.1.3 "Priority of functions" applies.
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Controller 1 > Sequence lock acc to OT >
Operating line Range Factory setting
[Sequence 1] outside temp >
50.0...250.0 °C
250.0 °C
[Sequence 2] outside temp >
50.0...250.0 °C
250.0 °C
[Sequence 3] outside temp > ¹
)
50.0...250.0 °C
250.0 °C
[Sequence 4] outside temp <
50.0...250.0 °C 50.0 °C
[Sequence 5] outside temp < ¹
)
50.0...250.0 °C 50.0 °C
¹
)
only available in controller 1.
15.4.2 Operating principle
You can lock heating sequences at a higher outside temperature and cooling
sequences at a lower outside temperature. This ensures that heating is deactivated
in summer and cooling in winter. The switching differential is 2 K (fixed value).
If individual sequences are locked, the controller continues to control with the other
sequences. Thus, if e.g. sequence 2 is locked, the controller provides heating
control as follows: Sequence 1, then sequence 3 (sequence 2 does not delay
control).
15.4.3 Troubleshooting
A check is made to see if a sensor is connected to the input when exiting the
commissioning menu. If the sensor is connected but missing later, a fault message
"Sensor error X.." is generated.
If the outside temperature is not available, the sequences are not locked.
Note
Setting values