Rockwell-automation 1769-SM2 Compact I/O DSI/Modbus Communication Modu Instrukcja Użytkownika Pobierz pdf (Strona 56)

3-18 Configuring the Module

Figure 3.18 Example RTU Format HIM Screen for CH1 Drives

2. Reset the module (see Resetting the Module on page 3-20).

Setting the RTU Rx Delay Time

1. Set the values of Parameters 16 - [RTU Rx Delay 1], 31- [RTU Rx

Delay 2], and 46 - [RTU Rx Delay 3] to establish the inter-character

delay time that detects the end of a receive packet for the respective

channel.

Figure 3.19 Example RTU Rx Delay HIM Screen for CH1 Drives

2. Reset the module (see Resetting the Module on page 3-20).

Setting the RTU Tx Delay Time

1. Set the values of Parameters 17 - [RTU Tx Delay 1], 32- [RTU Tx

Delay 2], and 47 - [RTU Tx Delay 3] to establish the inter-frame

delay time that delays the sending of a transmit packet for the

respective channel.

Value Format

0 8-N-1 (default)

1 8-E-1

2 8-O-1

3 8-N-2

4 8-E-2

5 8-O-2

RTU Format 1

Parameter: #

015

VALUE LIMITS SEL 

Default: 0 milliseconds

Minimum: 0 milliseconds

Maximum: 500 milliseconds

RTU Rx Delay 1

Parameter: #

016

VALUE LIMITS SEL 

TIP: If the Modbus RTU slave is a PowerFlex 4-Class drive, set the

value of [RTU Rx Delay x] to 2 milliseconds when the value of

[RTU Baud Rate x] is 19200.

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Rockwell-automation 1769-SM2 Compact I/O DSI/Modbus Communication Modu Instrukcja Użytkownika Strona 56