Cooper DF6000 Manual de usuario descargar pdf (Pagina 45)

DF6000 - USER MANUAL

Protocol Format

Normal Communications to Devices:

With the command bits set for the 'Normal' command and the MSB of the 3 mode bits set at 0, this

shortened version of the normal communications to each device allows the analogue reply or status from

each device to be read. This format of communication is generally used throughout all background

supervision of the addressable loop.

Alarm Interrogate Command:

This command is seen by all devices on the loop, so no address byte is required, and is periodically sent

out during normal communications. This command allows any device experiencing an alarm condition to

respond, with callpoints given the highest priority, reporting their address. This causes the control panel

to break off from general background supervision of the loop and focus directly on the device in question.

Full Protocol Format:

With the command bits set for the 'Normal' command and the MSB of the 3 mode bits set at 1, the long

version of the normal communications can be sent to any device. This would normally be done by the

panel following a response to the alarm Interrogate command, allowing the panel to check the device

address, ID and conﬁrm that the analogue reply, or status, is truly an alarm condition before actioning the

panel sounder outputs, for example.

Viewing the Voltage and Current waveforms at the panel:

Loop 1: Using a digital storage oscilloscope, connect one channel to R34 on the loop driver card;

probe 0V clip to the 'in-board' side of the resistor. This will display the loop current. Connect the

other channel to Loop 1, S+ terminal on the main mother board. DO NOT connect the 0v clip of

this probe.

Loop 2: Using a digital storage oscilloscope, connect one channel to R36 on the loop driver card;

probe 0V clip to the 'in-board' side of the resistor. This will display the loop current. Connect the

other channel to Loop 2, S+ terminal on the main mother board. DO NOT connect the 0v clip of

this probe

Section 3 - Commissioning

Byte 1

Byte 2

Byte 3

Parity

Command

2ms

300us

Start

Panel to Device Device to Panel

Response

8bits

5bits

Flags

3bits

Loop Current

24v

typ

7.5v

Mode

1.1 ms

Each Packet of Comms above must be separated by a gap of 20ms minimum where the line is held at 24v

1 2 ... 40 41 42 43 44 45 46 47 48 49 50 ... 113 114

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Cooper DF6000 Manual de usuario Pagina 45

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