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SeaI/O User Manual

(0x64) Set A/D, D/A Configuration

SeaI/O devices featuring analog to digital or digital to analog conversions can be

configured via a Modbus command. Upon a successful operation, the SeaI/O module

will respond with the response packet shown below.

Request Response

Field Name (Hex) Field Name (Hex)

Function

Device Config

Channels 1-4 Config

Channels 5-8 Config

Channels 9-12 Config

Channels 13-16 Config

The configuration byte stream is defined as follows:

BYTE

BIT

Device Config A/D Voltage Reference A/D Channel Mode

1-4 Config Ch 1 Range Ch 2 Range Ch 3 Range Ch 4 Range

5-8 Config Ch 5 Range Ch 6 Range Ch 7 Range Ch 8 Range

9-12 Config Ch 9 Range Ch 10 Range Ch 11 Range Ch 12 Range

13-16 Config Ch 13 Range Ch 14 Range Ch 15 Range Ch 16 Range

The actual values for the configuration options above (A/D Voltage Reference, A/D

Channel Mode, and A/D Ch xx Ranges) are enumerated in SeaMaxW32.h, included

with the SeaMAX libraries, and shown in the table below.

A/D Voltage Reference A/D Channel Mode Ch xx Ranges

ANALOG_OFFSET = 0 SINGLE_ENDED = 0 ZERO_TO_FIVE = 0

GND_OFFSET = 1 DIFFERENTIAL = 1 PLS_MIN_FIVE = 1

AD_REF_OFFSET = 2 CURRENT_LOOP = 2 ZERO_TO_TEN = 2

DA_CHANNEL_1 = 4 PLS_MIN_TEN = 3

DA_CHANNEL_2 = 8

1 2 ... 60 61 62 63 64 65 66 67 68 69 70 ... 108 109

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Impulse 463E Uživatelský manuál Strana 65