2.2.5. Alarm Silence Command Class, version 1

The Alarm Silence Command Class may be used to temporarily disable the sounding of the alarm but still keep the alarm operating.

2.2.5.1. Alarm Silence Set Command

This command is used to remotely silence the sensor alarm.

Table 2.33 Alarm Silence Set Command

7

6

5

4

3

2

1

0

Command Class = COMMAND_CLASS_SILENCE_ALARM (0x9D)

Command = SENSOR_ALARM_SET (0x01)

Mode

Seconds 1 (MSB)

Seconds 2 (LSB)

Number of Bit Masks

Bit Mask 1

…

Bit Mask N

Mode (8 bits)

Mode specifies the different options to silence sensor alarms. Modes are defined by the Z-Wave Alliance.

Table 2.34 Alarm Silence Set Command Modes

Value

Mode

0x00

Disable sounding of all sensor alarms independent of bit mask

0x01

Disable sounding of all sensor alarms independent of bit mask which have received the alarm via the Sensor Alarm Report command

0x02

Disable sounding of all sensor alarms according to bit mask

0x03

Disable sounding of all sensor alarms according to bit mask which have received the alarm via the Alarm Sensor Report Command

Seconds (16 bits)

The field Seconds indicates the duration sounding of the alarm must be disable but still keep the alarm operating. If silence is engaged, the alarm will come back on when the duration expires unless the originating sensor clears the alarm. The value 0x0000 indicates that the time field MUST be ignored.

Number of Bit Masks (8 bits)

Indicates the Number of Bit Masks fields used in bytes.

Bit Mask (N Bytes)

The Bit Mask fields describe the sensor types to disable sounding from.

  • Bit 0 in Bit Mask 1 indicates if Sensor Type = 0 (General Alarm) is disabled.

  • Bit 1 in Bit Mask 1 indicates if Sensor Type = 1 (Smoke Alarm) is disabled.

  • …

If the sensor type is disabled the bit MUST be set to 1. If the sensor type is not disabled the bit MUST be set to 0. It is only necessary to send the Bit Mask fields from 1 and up to the one indicating the last sensor type to be disabled.