Bryant 580J*04--12 Installationshandbuch PDF herunterladen (Seite 13)

SW3 Protocol Selection

PROTOCOL DS8 DS7 DS6 DS5 DS4 DS3 DS2 DS1

BACnet MS/TP

(Master)

Unused OFF OFF OFF ON OFF Select Baud Select Baud

Modbus

(Slave)

Unused OFF OFF ON ON OFF Select Baud Select Baud

(Slave)

Unused OFF OFF OFF ON ON OFF OFF

LonWorks Unused ON ON OFF ON OFF OFF ON

NOTE:

DS = Dip Switch

BACnet MS/TP SW3 example shown

Baud Rate Selections

BAUD RATE DS2 DS1

9600 OFF OFF

19,200 ON OFF

38,400 OFF ON

76,800 ON ON

C07166

Fig. 13 -- RTU Open SW3 Dip Switch Settings

C10815

Fig. 14 -- RTU Open Address Switches

C10816

Fig. 15 -- Network Wiring

Modbus

The RTU Open module can speak the Modicon Modbus

RTU Protocol as described in the Modicon Modbus

Protocol Reference Guide, PI----MBUS----300 Rev. J. The

speed of a Modbus network can range from 9600 to 76.8K

baud. Physical Addresses can be set from 01 to 99.

Johnson N2

N2 is not a standard protocol, but one that was created by

Johnson Controls, Inc. that has been made open and

available to the public. The speed of N2 network is

limited to only 9600 baud. Physical Addresses can be set

from 01 to 99.

LonWorks

LonWorks is an open protocol that requires the use of

Echelon’s Neuron microprocessor to encode and decode

the LonWorks packets. In order to reduce the cost of

adding that hardware on every module, a separate

LonWorks Option Card (LON--OC) was designed to

connect to the RTU Open.

This accessory card is needed for LonWorks and has to be

ordered and connected using the ribbon cable to plug J15.

The RTU Open’s baud rate must be set to 38.4k to

communicate with the LonWorks Option Card. The address

switches (SW1 & SW2) are not used with LonWorks.

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