Remote Programming On The Multimeter By A Computer; General About The Protocol; Check Presence Dialogue; Command Dialogue - Metrix SX-ASYC2 Manual De Instrucciones

5.

REMOTE PROGRAMMING ON THE MULTIMETER BY A COMPUTER

WARNING :
5.1.

General about the protocol

The computer is the master of the link during communication; the computer always
takes the initiative of the dialogue.
Each dialogue is in the following form:
- the computer sends an instruction
- the multimeter answers this instruction.
These two messages pass one after the other, since the link is half duplex.
There are three types of dialogues, firstly the check presence dialogue, then the
comments dialogue and the request dialogue.

5.1.1. Check presence dialogue

PC
Instruction
Answer 1
#
Note

5.1.2. Command dialogue

PC
Instruction
Answer 1
II
- 6
The accidental sending of certain messages might erase
strategic datas kept in the memory of the multimeter.
In that case, the multimeter might not work properly and it
will have to be sent back to the Metrix after sales
department or to a Metrix local agency to be repaired.
The Metrix warranty does not cover such a case.
Therefore, it is highly recommended to ensure that the
messages whatsoever are valid and comply with the
messages which are given in this manual.
DMM
ENQ
ACK
The hex code of the ASCII ENQ character = 05H
The hex code of the ASCII ACK character = 06H
DMM
ENQ
ACK
Meaning
PC: "Are you there?"
DMM : "Yes!"
Meaning
PC: "Execute this comand?"
DMM : "OK!"
SX-ASYC2