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Technical Information

RS 232/RS 485 Communication Description

MS40+ Single Stage Rotary Vane Pumps User Manual / 87-901-008-01 (H.00) 88/104

Window Protocol Description

Communication Format

The communication protocol is a MASTER/SLAVE type where:

 8 data bit

 no parity

 1 stop bit

 baud rate: 600/1200/2400/4800/9600/19200/38400

rogrammable

Communication Protocol

The communication protocol is a MASTER/SLAVE type where:

 Host = MASTER

 Controller = SLAVE

The communication is performed in the following way:

1. The host (MASTER) send a MESSAGE + CRC to the controller

(SLAVE);

2. The controller answer with an ANSWER + CRC to the host.

The MESSAGE is a string with the following format:

Where:

NOTE

When a data is indicated between two quotes (‘...’) it means that the indicated

data is the corresponding ASCII character.

 <STX> (Start of transmission) = 0x02

 <ADDR> (Unit address) = 0x80 (for RS 232)

 <ADDR> (Unit address) = 0x80 + device number (0 to 31) (for RS 485)

 <WIN> (Window) = a string of 3 numeric character indicating the

window number (from ‘000’ to ‘999’); for the meaning of each

window see the relevant paragraph.

 <COM> (Command) = 0x30 to read the window, 0x31 to write into

the window

 <DATA> = an alphanumeric ASCII string with the data to be

written into the window. In case of a reading command this field

is not present. The field length is variable according to the data

type as per the following table:

Agilent Technologies MS40+ User Manual

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