Contemporary Control Systems BASRTP-B Посібник з монтажу - Сторінка 16

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those passed by the router from BACnet/IP. The default value

usually provides good performance.

MS/TP Baud Rate

(Default Value = 9600)

The baud rate of the MS/TP network can be 9600, 19200, 38400

or 76800 bps. All MS/TP devices on the same MS/TP network

must use the same baud rate. On power up the router checks for

other masters; if finding none, it begins token passing — at which

point autobauding devices will adjust to the router's baud rate.

MS/TP Tolerance

(Default Selection = Strict)

This setting determines the degree to which interoperability with

devices is successful. The Lenient option is less efficient for

traffic flow but optimizes interoperability. A slight improvement

in performance will be realised by selecting the Strict setting.

Status Screen

The Status Screen depicted in Figure 11 reports the traffic of the

various protocols handled by the BASRTP-B.

It shows the

number of messages received and transmitted for each of the

supported networks.

Note: ―BIP 1‖ is the only BACnet/IP port in use. Although it

appears in the screen, ―BIP 2‖ is not used in this version of the

product. Therefore, the counts of ―BIP 2 Incoming Packets‖ and

―BIP 2 Outgoing packets‖ will always be 0.

―Available Memory‖ (at the bottom of the list) is the amount of

RAM currently unused (normally about 30K). If one network is

temporarily offline and another network is attempting to

communicate with this network, the available memory may drop

very low until the offline network returns to an online condition.

The remaining information indicates the instantaneous MS/TP

state of the router and is documented in the MS/TP portion of the

BACnet standard.

―RFSM‖ is the current Receive Frame State Machine state.

―MNSM‖ is the current Master Node State Machine state.

TD070210-0ID