Siemens SIMATIC TI500 Bedienungsanleitung PDF herunterladen (Seite 37)

Gateway Installation and Configuration

3-9

TIWAY I Gateway User Manual

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, select Full-duplex.

Modbus/IDT

Data Addressing

(Switch 7):

Set this switch to the On (1)

position to implement a data addressing scheme for the IDT



family of

operator interface products. Set this switch to the Off (0) position to select

standard Modbus data addressing.

NRZI/NRZ Encoding (Switch 8):

The NRZI/NRZ (non-return to zero

inverted/non-return to zero) switch selects the type of encoding to be used

during network communication. The NRZI encoding option is required for

asynchronous operation. Either NRZI or NRZ may be used with

synchronous operation, but NRZ encoding is recommended.

Test/Operate (Switch 9):

This switch selects either T

est or Operate mode.

ou should always set this switch to Operate.

Y/C Coil T

ype Select

(Switch 10)

This switch collects coil data from a

secondary’

s Control Relay (C) memory when set to On (1). In the Off (0)

position, coil information is collected from Discrete Output (Y) memory

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Siemens SIMATIC TI500 Bedienungsanleitung Seite 37