SG Security Communications MLR2-E Manuel d'utilisateur télécharger pdf (Page 56)

Form Number.: 7-3005 File Name: SG Automation Output Revision/Date: 01/May 3, 2005

Department: Engineering

Division: Embedded Software Form Template Owner: Jeff Cougler

next queued signal. In case of communication failure with the automation, the Sur-Gard receiver can store up to 255 messages

per line card in its internal memory. The communication is resumed when the first ACK is received on the heartbeat.

CPM2 Automation

Heartbeat

[ACK] 06H

Message 1 (attempt 1)

Wait up to 4 seconds…

Message 1 (attempt 2)

[ACK] 06H

Message 2 (attempt 1)

[NAK] 15H

Message 2 (attempt 2)

[NAK] 15H

Message 2 (attempt 3)

[NAK] 15H

Message 2 (attempt …)

[NAK] 15H

Message 2 (attempt 20)

[NAK] 15H

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SG Security Communications MLR2-E Manuel d'utilisateur Page 56