Basic Documentation

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Siemens VAV compact controller KNX/PL-Link G..B181.1E/KN CE1P3547en
Smart Infrastructure 2021-10-252021-10-25
9.5.6 Device Jam
• If an actuator can’t reach a target position due to a mechanical failure or an
angle limitation screw, a device jam alarm is thrown as ETS error, see “Group
objects description”.
• The device jam is detected ca. 30s after the effective mechanical end stop
(when lying before the target end stop) is reached.
• After 30..35s the motor stops and an alarm/status message is sent over the
bus if configured accordingly.
• Initiating an adaptation run while the actuator is jammed does not resolve the
alarm by using the mechanical end stop as reference position.
9.5.7 Operating mode
The operating mode determines whether the setpoint signal (0…100 %) from the
supervisory controller is interpreted as volume flow control or as (air damper)
position control.
If used as damper control signal, the actual values from the flow sensor remain
available. This allows to implement the flow control loop in an external controller.
9.5.8 Backup mode
In case the communication to the controller is lost, the device can be configured to
go into a defined state. This function utilizes a watchdog which monitors setpoint
write access over the bus.
Default setting of this backup mode is “Off”, i.e. in case of a communication loss,
the device controls to the last received setpoint until an updated setpoint is
received.
If the backup mode is enabled, it can be configured as follows:
• go to a position predefined by the parameter “Backup position”,
• keep current position without controlling to the last received setpoint.
When the device is in backup mode and receives a setpoint over the bus again, it
wakes up and controls to the setpoint again.
9.5.9 Restarting the device
Restarting is possible by a power-reset (switching operating voltage off and on).
Effect of restart: Device re-initializes and sets all process values to defaults.
Parameters and group object bindings are not reset.
9.5.10 Reset behavior
The actuator supports the following re-initialization / reset behavior:
• Local reset by push-button: cf. section 2.4
• Tool-reset, cf. section 0
• Remote reset: Using the “OEM Reset” group object.
Effect of reset:
• Process values: set to ex-works default values.
• Parameters:
- Application and actuator parameters are set to factory or OEM defaults,
- Network parameters are reset only in case of local reset, not by remote
reset (otherwise loss of communication).
• Counters, status flags, and factory data are not reset.