SG Security Communications MLR2-E Manual de usuario descargar pdf (Pagina 55)

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

SG-CPM3 v1.70 and higher supports the ability to update the time and date from the automation via the TCP/IP socket only.

The Automation Command Packets may be sent only in response to any packet sent by the receiver. The command is sent in the

following structure to the CPM3.

Signal Command Length Date Time Description

ACK + COMMAND 17 00 0B 07 D5 05 05 00 0E 1F 00 ACK the previous alarm and

set the time & date to May 5,

2005 2:31:00pm

(note the above values are hex bytes)

The Set Date/Time command sets the current date and time on the CPM3 to the date and time setting .This in turn also has the

effect of updating the date and time on all of the line cards. The Date and Time fields are each 4 byte integer values, which are

described below. An ACK is returned if the requested data and time were successfully set; NAK is returned if an error occurred

(i.e. the values sent were an invalid data or time representation) See also the Receiver Command ACK/NACK packets.

Field Bits

Year (A.D.) 31-16

Month (1-12) 15-8

Date

Day (1-31) 7-0

Hour (0-23) 31-16

Minute (0-59) 15-8

Time

Second (0-59) 7-0

6.4.2 Automation Absent Condition

When the automation is not responding to the output transmissions, the CPM will generate a trouble. When an output trouble

occurs, the CPM will continue to attempt to send a signal to the automation until it gets a response. The signal that is used and

the timing of the signal are dependent on whether the heartbeat signal is enabled or not.

The CPM will use the heartbeat signal to poll the output for a response. It will make 4 attempts, then wait a programmable

heartbeat interval of time before making another 4 attempts. The typical heartbeat interval is 10 seconds.

Supervisory Heartbeat Signal Protocol (1):

1RR000sssssssssss@ssss[DC4]

RR : Receiver number (Real programmed number, never virtual).

S : Space Character.

@ : Supervisory Signal.

[DC4] : Terminator, 14 Hex.

This signal is used to supervise the communication between the receiver and the automation. Once one acknowledgement of

this signal, with an [ACK] is sent by the automation, the link shall be considered restored.

If a computer/automation failure should occur, the CPM will switch to manual mode, meaning manual acknowledgements for

each signal. When the receiver buffer(s) become full, the line cards will stop answering the calls.

6.5 Signals Data Flow And Timings

The Sur-Gard receiver requires an acknowledgement signal [ACK] (Hex 06) from the automation software within 4 seconds for

each message sent. Failure to receive the [ACK] will result in the re-transmission of the same signal three times before giving

up. If the receiver receives a [NAK] (hex 15), the Receiver will re-send the signal 20 times before giving up and process the

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SG Security Communications MLR2-E Manual de usuario Pagina 55

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