2.2.4. Alarm Sensor Command Class, version 1 [DEPRECATED]

Warning

THIS COMMAND CLASS HAS BEEN DEPRECATED

A device MAY implement this command class, but it is RECOMMENDED that new implementations use the Notification Command Class.

If implementing this Command Class, it is RECOMMENDED that the Notification Command Class is also implemented.

The Alarm Sensor Command Class is used to realize Sensor Alarms.

2.2.4.1. Alarm Sensor Get Command

This command is used to request the status of a sensor.

The Alarm Sensor Report Command MUST be returned in response to this command if the sensor type is supported.

This command MUST NOT be issued via multicast addressing.

A receiving node MUST NOT return a response if this command is received via multicast addressing. The Z-Wave Multicast frame, the broadcast NodeID and the Multi Channel multi-End Point destination are all considered multicast addressing methods.

Table 2.28 Alarm Sensor Get Command

7

6

5

4

3

2

1

0

Command Class = COMMAND_CLASS_SENSOR_ALARM (0x9C)

Command = SENSOR_ALARM_GET (0x01)

Sensor Type

Sensor Type (8 bits)

Sensor Type specifies what type of sensor this command originates from. Refer to Table 2.29. The sensor type value 0xFF returns the first found supported sensor type in the bit mask (starting from bit 0 in Bit Mask 1) by the Alarm Sensor Supported Report.

Table 2.29 Alarm Sensor Get::Sensor Type encoding

Value

Sensor Type

0x00

General Purpose Alarm

0x01

Smoke Alarm

0x02

CO Alarm

0x03

CO2 Alarm

0x04

Heat Alarm

0x05

Water Leak Alarm

0xFF

Return first Alarm on supported list

2.2.4.2. Alarm Sensor Report Command

This command is used to advertise the alarm state.

Table 2.30 Alarm Sensor Report Command

7

6

5

4

3

2

1

0

Command Class = COMMAND_CLASS_SENSOR_ALARM (0x9C)

Command = SENSOR_ALARM_REPORT (0x02)

Source Node ID

Sensor Type

Sensor State

Seconds 1 (MSB)

Seconds 2 (LSB)

Source Node ID (8 bits)

Specify the source node ID, which detected the alarm condition. In a Zensor Net is it not possible to determine the source node ID because the frame is broadcast forwarded without this information on protocol level.

Sensor Type (8 bits)

Refer to Section 2.2.4.1 Alarm Sensor Get Command.

The Sensor Type 0xFF MUST NOT be advertised in this command.

Sensor State (8 bits)

The Sensor State parameter returns the current alarm state. The value 0x00 indicates no alarm and 0xFF indicates alarm. Furthermore it can return values from 0x01 to 0x64 to indicate severity of the alarm in percentage.

The values 0x65…0xFE are reserved and MUST be ignored by receiving nodes.

Seconds (16 bits)

The field Seconds indicates time the remote alarm must be active since last received report. The value 0x0000 indicates that the time field MUST be ignored.

2.2.4.3. Alarm Sensor Supported Get Command

This command is used to request the supported sensor types from the device.

The Alarm Sensor Supported Report Command MUST be returned in response to this command.

This command MUST NOT be issued via multicast addressing.

A receiving node MUST NOT return a response if this command is received via multicast addressing. The Z-Wave Multicast frame, the broadcast NodeID and the Multi Channel multi-End Point destination are all considered multicast addressing methods.

Table 2.31 Alarm Sensor Supported Get Command

7

6

5

4

3

2

1

0

Command Class = COMMAND_CLASS_SENSOR_ALARM (0x9C)

Command = SENSOR_ALARM_SUPPORTED_GET (0x03)

2.2.4.4. Alarm Sensor Supported Report Command

This command is used to report the supported sensor types from the device.

Table 2.32 Alarm Sensor Supported Report Command

7

6

5

4

3

2

1

0

Command Class = COMMAND_CLASS_SENSOR_ALARM (0x9C)

Command = SENSOR_ALARM_SUPPORTED_REPORT (0x04)

Number of Bit Masks

Bit Mask 1

…

Bit Mask N

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 supported sensor types by the device.

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

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

  • …

The sensor type is supported if the bit is 1 and the opposite if 0. It is only necessary to send the Bit Mask fields from 1 and up to the one indicating the last supported sensor type. The number of Bit Mask fields transmitted MUST be determined from the length field in the frame.

Note that the mapping of bit 1 to Sensor Type =1 differs from the support mapping used by the Multilevel Sensor Command Class. The Multilevel Sensor Command Class maps bit 0 to Sensor Type = 1.