Siemens SIMATIC TI500 Manual de usuario descargar pdf (Pagina 35)

Gateway Installation and Configuration

3-7

TIWAY I Gateway User Manual

The

8-switch bank governs the host interface. The following paragraphs

describe the switch-selectable options for setting the host interface

parameters.

Data T

ransmission Rate Selection

(Switches

1 through 4)

For the host

port, T

able 3-3 shows what data transmission rates are supported on the

listed host systems. (Refer to Figure 3-3 for the host baud rate dipswitch

settings.)

able 3-3

Data T

ransmission Rates Supported

Host System Data Transmission Rates Supported

110 150 300 600 1200 2400 4800 9600 19.2k

Foxboro

      

Honeywell

 

Fisher

      

Asynchronous/Synchronous

Operation

(Switch 5):

The Synch/Asynch

switch is used for modem operation. In the synchronous mode, transmitter

signal element timing is used to send

transmit

data. The transmitter and

receiver signal timing elements are supplied by the modem. In the

asynchronous position, the modem does not supply receiver or transmitter

timing elements and the Gateway uses internal clocks to determine

receive

data sample points and to send

transmit

data. Y

ou should use the

asynchronous setting.

Full/Half

Duplex Operation

(Switch 6):

the Full/Half Duplex switch

selects operation compatible with full or half duplex modems even though

communication with the Gateway is half duplex only

. When you select

Half-duplex operation, the Gateway does not activate the Request to Send

circuit before Data Carrier Detect becomes inactive. T

iming relationships

between Data Carrier Detect and Request to Send are ignored when full

duplex is selected. When you are using a half-duplex modem, you should use

the Half-duplex setting; with a full-duplex modem, use the Full-duplex

setting.

Parity

Enable/Disable

(Switch 7):

This will either enable or disable parity

in all data transmissions.

Even/Odd Parity (Switch 8):

If Switch 7 (Parity Enable/Disable) is set to

enable parity

, switch 8 selects even or odd parity

Dipswitch Settings

for the Host

Inter

face Port

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 93 94

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Siemens SIMATIC TI500 Manual de usuario Pagina 35

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