CARLO GAVAZZI EM21 - COMMUNICATION PROTOCOL V1 REV0 Manual de usuario descargar pdf (Pagina 10)

CARLO GAVAZZI

CONTROLS

SERIAL COMMUNICATION PROTOCOL

WM24-96

V1 R0

Page

2.2.3 Reading of the instrument status

Example 3: reading of the “present modules+digital input status” word

1-word read request frame (8 byte)

01h 04h 00h B2h 00h 01h CRC CRC

1-word read answer frame (7 byte):

01h 04h 02h 89h 77h CRC CRC

Module variable value: 89h = 10001001

IN_CFPGM = 1 Programming: enabled

IN_CFOUT = 0 Digital output module: present

Example 4: Alarm status read command

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

01h 04h 00h B4h 00h 01h CRC CRC

Read command answer frame (7 byte):

01h 04h 02h 35h 35h CRC CRC

Alarm 1: Alarm ON Digital input 1: closed

Alarm 2: Alarm OFF Digital input 2: closed

2.2.4 Write command for remote digital output

If a digital output is set as “rem” (remote, see EEPROM map), it is possible to remotely set/reset it

writing a word on address 00B4h according to the following table.

Alarm 1 Alarm 2 MSB LSB

OFF OFF 00h 00h

ON OFF 01h 00h

OFF ON 02h 00h

ON ON 03h 00h

Example 5: Frame to set alarm 1 = ON and alarm 2 = OFF

Request frame: A1 = ON and A2 = OFF (8 byte):

01h 06h 00h B4h 01h 00h CRC CRC

Answer frame (8 byte):

01h 06h 00h B4h 01h 00h CRC CRC

Example 6: Frame to set alarm 1 = OFF and alarm 2 = OFF

Request frame: A1 = OFF and A2 = OFF (8 byte):

01h 06h 00h B4h 00h 00h CRC CRC

Answer frame (8 byte):

01h 06h 00h B4h 00h 00h CRC CRC

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CARLO GAVAZZI EM21 - COMMUNICATION PROTOCOL V1 REV0 Manual de usuario Pagina 10