B&B Electronics RS-485 manual Read Module Configuration

Read Module Configuration

The Read Module Configuration command reads the 485SDA10’s address first, then the power-up states, and finally the turn-around delay.

The steps to reading a module’s configuration are given below:

1)Constructing the command string:

Command$ = “!” + CHR$(addr) + “RC”

Where addr is the module’s address.

2)Transmitting the command string:

Print #1, Command$

3)Receiving the address data:

Reply$ = INPUT$(1,#1)

4)Determining the address: address = ASC(Reply$)

5)Receiving the power-up states data:

Reply$ = INPUT$(1,#1)

6)Determining the power-up states: states = ASC(Reply$)

Refer to Read Digital I/O earlier in this chapter for the steps to determine the status of individual output states.

7)Receiving the turn-around delay data:

Reply$ = INPUT$ (1,#1)

8)Determining the turn-around delay: delay = ASC(Reply$)

Example 5.7 – Determining the configuration of the module with an address of 10.

addr = 10

Command$ = “!” + CHR$(addr) + “RC” Print #1, Command$

‘Determine the module’s address

Reply$ = INPUT$ (1,#1) address = ASC(Reply$)

‘Determine the module’s power-up states

Reply$ = INPUT$ (1,#1) states = ASC(Reply$)

‘Determine the module’s turn-around delay

Reply$ = INPUT$ (1,#1) delay = ASC(Reply$)

28 485SDA103798 Manual

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