CARLO GAVAZZI WM4-96 - PROGRAMMING Bedienungsanleitung PDF herunterladen (Seite 38)

CARLO GAVAZZI

CONTROLS

SERIAL COMMUNICATION PROTOCOL

WM4-96

V1 R3

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3.4 EXAMPLES: HOW TO READ THE DATA FROM EEPROM

NOTE: EEPROM is structured in word (if not differently advised) which are sent in the order MSB,

LSB.

The value of the variables stored in EEPROM are 4-byte integer except from the values of the power

which are stored in a different way. Refer to example 22 to know how to read the power values.

3.4.1 Reading and resetting maximum and minumum

Example 19: “12

MAXIMUM variable type” read command

4-word read command request frame (8 byte):

01h

04h

20h

D6h

00h

01h

CRC

read command answer frame (7 byte):

01h

04h

02h

50h

0Ah

CRC

MAX-variable type address: 20D6h

Stored variable value: 0Ah = 10 (decimal)

Variable type: A L3 (phase 3 current)

Example 20: “Current info” read command

“Info A” read request frame (frame 8 byte):

01h 04h 00h E8h 00h 01h CRC

CRC

“Info A” read answer frame (frame 7 byte):

01h 04h 02h 06h 04h CRC

CRC

Info V value: 06h decimal point position: 1111

Info A value: 04h decimal point position: 11.11

Example 21: value of the “12

MAXIMUM” read command

1-word read request command (8 byte):

01h

04h

21h

16h

00h

01h

CRC

read answer frame (7 byte):

01h

04h

02h

03h

6Ch

CRC

Address of 12

MAX value: 2116h

Stored value: 036Ch = 876 (decimal)

Taking into account the results of the previous examples:

A L3 value: 8.76 A

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