CARLO GAVAZZI UDM 40 - PROGRAMMING Manual de usuario descargar pdf (Pagina 5)

CARLO GAVAZZI

CONTROLS

SERIAL COMMUNICATION PROTOCOL

UDM - USC

V1 R1

Page

command.

IMPORTANT: if the address is 00 (zero) all the instruments connected to the network will execute

the command but won’t send an answer frame.

If the request frame contains an invalid function, the answer frame will be an “exception response”.

Exception response

1.2.6 Address

Function Diagnostic code Value CRC

1 byte 1 byte 2 byte 2 byte 2 byte

From 1 to 255 88h 00h 00h AAh 55h MSB LSB

1.3 MEMORY AREA

UDM and USC manage two different memory areas addressed as follows.

Function 03h, 04h and 06h:

Memory area Area

Internal RAM

From 3001h to 3006h

Data storage EEPROM

From E000h to E071h

1.4 UDM AND USC IDENTIFICATION CODE

Every Carlo Gavazzi instrument is identified by means of a code in order to recognise the type of the

instrument via serial communication.

The UDM and USC family codes are:

- 1Ah LSX and LSE module

- 1Bh HSX module

- 1Ch TRX module.

These codes can be read with the following fixed frame:

Instrument code request frame (8 byte):

01h

04h

00h

0Bh

00h

01h

40h

08h

LSX or LSE code answer frame (7 byte):

01h

04h

02h

00h

1Ah

38h

FBh

HSX code answer frame (7 byte):

01h

04h

02h

00h

1Bh

F9h

3Bh

TRX code answer frame (7 byte):

01h

04h

02h

00h

1Ch

B8h

F9h

1 2 3 4 5 6 7 8 9 10 ... 22 23

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