BO PWM with Pulse width modulation: variable period

The following sections show the properties of analog outputs (AO) with the signal type "BO PWM" and the subsystem-specific extension "Pulse width mod.: variable period". Analog outputs with the subsystem-specific extension "Pulse width mod.: variable period" are not supported in Desigo 5.x.

Channel configuration properties

The listed properties are displayed in the Hardware and network editor > Inspector window > Properties tab when the data point is selected in the Device view tab.

Signal type
"Signal type" defines the DRA signal type. Available signal types depend on I/O module type. The signal type can be edited.

Unit
"Unit" defines the physical unit of the input or the output.

Save as
"Save as" saves the set parameters of the I/O data point as an xml-file.

Save as

"Save as" saves the set parameters of the I/O data point as an xml-file.

Subsystem-specific extension properties

The listed properties are displayed in the BACnet objects editor > Inspector window > Properties > Configuration tab when the data point is selected in the editor table.

✳ Indicates a Siemens proprietary property.

Maximum pulse rate
"Maximum pulse rate" defines the pulse rate for a process value 100 %. If the process value is 100%, the actuator is not held constantly open and pulses are nevertheless generated at the defined rate (important for thermal actuators: This prevents an overheating of the wax ampoule in the actuator). Range: 0...100 [%] Default: 50% Examples: Maximum pulse rate 80%: 50%: 33%:
Property ID: 4982

Maximum pulse rate

"Maximum pulse rate" defines the pulse rate for a process value 100 %.
If the process value is 100%, the actuator is not held constantly open and pulses are nevertheless generated at the defined rate (important for thermal actuators: This prevents an overheating of the wax ampoule in the actuator).
Range: 0...100 [%]
Default: 50%

Examples: Maximum pulse rate

80%:

50%:

33%:

Property ID: 4982

Minimum pulse rate
"Minimum pulse rate" defines the pulse frequency for a process value 0%. If the process value is 0% (OFF), a pulse is nevertheless generated at the defined rate (important for thermal actuators: To actuator remains warm resulting in a faster reaction). Range: 0...100 [%] Examples: Minimum pulse rate 10%: 5%: Min. fixed switch-on time: 1 second Min. fixed switch-off time: 1 second
Property ID: 4983

Minimum pulse rate

"Minimum pulse rate" defines the pulse frequency for a process value 0%.
If the process value is 0% (OFF), a pulse is nevertheless generated at the defined rate (important for thermal actuators: To actuator remains warm resulting in a faster reaction).
Range: 0...100 [%]

Examples: Minimum pulse rate

10%:

5%:

Min. fixed switch-on time: 1 second
Min. fixed switch-off time: 1 second

Property ID: 4983

Minimum switch on/off time
"Minimum switch on/off time" defines the duration of a pulse (on or off). The length of the superposed period for thermal actuators is derived from this time and the process value (in %). Range: 00:01...13:20 [min:s] Examples for various process values: 75%: 50%: 25%:
Property ID: 4960

Minimum switch on/off time

"Minimum switch on/off time" defines the duration of a pulse (on or off). The length of the superposed period for thermal actuators is derived from this time and the process value (in %).
Range: 00:01...13:20 [min:s]

Examples for various process values:

75%:

50%:

25%:

Property ID: 4960

Output position
"Output position" defines whether the connected physical output is handled as NO (Normally Open) or NC (Normally Closed).
NO contact	The connected physical output is handled as NO.
NC contact	The connected physical output is handled as NC.
Property ID: 4970