B&B Electronics 232OPSDA User Manual download pdf (Page 16)

14 Documentation Number 232OPSDA1397 Manual

B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350

PH (815) 433-5100 -- FAX (815) 433-5105

Table 3.3 - Read A/D Response

NOTE: There are three test channels that can be read: Ref+, Ref-,

and Ref+/2. Specify 13 (0Dh) to read Ref+, 12 (0Ch) to read Ref-,

and 11 (0Bh) to read Ref+/2.

Reading Digital I/O Command

The Read Digital I/O command returns a byte which represents

the state of the digital input and digital output. Bit 0 corresponds to

the state of the digital output, and bit 3 corresponds to the state of

the digital input. If a bit is a 0 then the digital state of that digital I/O is

LOW. If a bit is a 1 then the digital state of the I/O is HIGH. NOTE:

Bits 1-2 and 4-7 of the data byte are ignored.

Command Syntax

!0RD

Unit Response

{states}

Where {states} is a byte in which bits 0 corresponds to the current

state of the digital output and bit 3 corresponds to the current state

of the digital input.

Set Digital Output Command

The Set Digital Output command is used to set the state of the

digital output line. This command requires a data byte. The data byte

is used to specify the output state. Bits 0 corresponds to the state of

the digital output. If bit 0 is a 0 then the output will be set LOW. If bit

0 is a 1 then the output will be set HIGH. NOTE: This command

ignores bits 1-7 of the data byte.

Command Syntax

!0SO{states}

Where {states} is a byte in which bit 0 corresponds to the output

state of the digital outputs.

Unit Response

no response

# of Channels Specified Response

decimal

Hex

ASCII

Channels Returned

(order of response)

Bytes

Returned

0 0 NUL Channel 0 2

1 1 SOH Channels 1,0 4

2 2 STX Channels 2,1,0 6

3 3 ETX Channels 3,2,..,0 8

4 4 EOT Channels 4,3,..,0 10

5 5 ENQ Channels 5,4,..,0 12

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 27 28

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