Agent for ESPA 4.4.4

    Alarming via the ESPA protocol 4.4.4 with the Alarm Control Center

    The ESPA 4.4.4 Agent (ESPA Agent) accepts messages from coupling systems via the ESPA Protocol 4.4.4 and forwards them to the alarm system Alarm Control Center . If a fault is no longer pending, the "message gone" event can also be triggered.

    Note on Desigo CC:
    From ACC V23 the Desigo CC agent as a new connection to the integrated building management platform Desigo CC. It replaces the previous connection via an ESPA 4.4.4 interface.

    The following systems can be connected, among others: 

    • Fire alarm systems
    Agent for ESPA 4.4.4
    Agent for ESPA 4.4.4

    Alarming via the ESPA protocol 4.4.4 with the Alarm Control Center

    The ESPA 4.4.4 Agent (ESPA Agent) accepts messages from coupling systems via the ESPA Protocol 4.4.4 and forwards them to the alarm system Alarm Control Center . If a fault is no longer pending, the "message gone" event can also be triggered.

    Note on Desigo CC:
    As of ACC V23 the Desigo CC agent serves as a new connection to the integrated building management platform Desigo CC. It replaces the previous connection via an ESPA 4.4.4 interface.

    The following systems can be connected, among others: 

    • Fire alarm systems
    Agent for ESPA 4.4.4

    ESPA agent as master unit

    The ESPA agent operates as a server and is called the master unit in the ESPA protocol. The agent can be addressed via a configurable serial interface by corresponding coupling systems such as a fire alarm system, radio system or pager systems. The coupling system represents the client and is called the slave unit in the ESPA protocol.

    Agent for ESPA 4.4.4

    ESPA agent as master unit

    The ESPA agent operates as a server and is called the master unit in the ESPA protocol. The agent can be addressed via a configurable serial interface by corresponding coupling systems such as a fire alarm system, radio system or pager systems. The coupling system represents the client and is called the slave unit in the ESPA protocol.

    Query via polling mechanism

    The communication between the ESPA agent and the coupling systems takes place via a polling mechanism. The agent cyclically polls the clients connected via the ESPA protocol 4.4.4 for new messages. If there is a new message, the client in question becomes the master unit for a short time and sends the new message to the agent before switching back to polling mode. The agent then forwards the message to the Alarm Control Center .

    Agent for ESPA 4.4.4
    Agent for ESPA 4.4.4

    Query via polling mechanism

    The communication between the ESPA agent and the coupling systems takes place via a polling mechanism. The agent cyclically polls the clients connected via the ESPA protocol 4.4.4 for new messages. If there is a new message, the client in question becomes the master unit for a short time and sends the new message to the agent before switching back to polling mode. The agent then forwards the message to the Alarm Control Center .

    Agent for ESPA 4.4.4

    ESPA Protocol 4.4.4

    ESPA 4.4.4 is a protocol for a serial interface. It enables data exchange between coupling systems and the Alarm Control Center. It follows the ISO 1177 definition and provides the communication in bit-synchronous and character-asynchronous format. Here, 1 start bit, 7 data bits, 1 parity bit and 2 stop bits are transmitted as standard. The permissible character set of the ESPA protocol 4.4.4 follows the international alphabet no. 5 according to the CCITT 3 and ISO 646 standard. The ESPA protocol 4.4.4 does not provide the transmission of special characters (e.g. ä,ü,ö,ß).

    Agent for ESPA 4.4.4

    ESPA Protocol 4.4.4

    ESPA 4.4.4 is a protocol for a serial interface. It enables data exchange between coupling systems and the Alarm Control Center. It follows the ISO 1177 definition and provides the communication in bit-synchronous and character-asynchronous format. Here, 1 start bit, 7 data bits, 1 parity bit and 2 stop bits are transmitted as standard. The permissible character set of the ESPA protocol 4.4.4 follows the international alphabet no. 5 according to the CCITT 3 and ISO 646 standard. The ESPA protocol 4.4.4 does not provide the transmission of special characters (e.g. ä,ü,ö,ß).

    Increased reliability with the Monitoring option

    Increased reliability is ensured by the ACC Monitoring option. The option monitors all functions of the Alarm Control Center and also provides the following functionalities for the ESPA agent:

    • Client Functional Check: It is tested whether the ESPA 4.4.4 client regularly sends an alive message.
    • Control system availability: It is checked whether the control system is functional and correctly connected to the ACC.
    • Message volume: It tests whether the number of messages per second in the agent's queue exceeds a configured limit.
    • Connection check: It is tested whether the agent receives data from the ESPA 4.4.4 client.
    Agent for ESPA 4.4.4
    Agent for ESPA 4.4.4

    Increased reliability with the Monitoring option

    Increased reliability is ensured by the ACC Monitoring option. The option monitors all functions of the Alarm Control Center and also provides the following functionalities for the ESPA agent:

    • Client Functional Check: It is tested whether the ESPA 4.4.4 client regularly sends an alive message.
    • Control system availability: It is checked whether the control system is functional and correctly connected to the ACC.
    • Message volume: It tests whether the number of messages per second in the agent's queue exceeds a configured limit.
    • Connection check: It is tested whether the agent receives data from the ESPA 4.4.4 client.

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