Defined Responses (Slave To Master - Ametek Dycor CG1100 Series User Manual

Defined Responses (slave to master)

There are three possible responses to a communication transfer initiated
by the master. These are a Simple Acknowledge, Acknowledge with Data,
and a Failure message.
Simple Acknowledge
If the received command does not require data to be returned, a simple
acknowledge consisting of an ASCII ' A ' will be sent.
Example:
slave:
Acknowledge with Data
If a command issued by the master requires data in response, an Acknowl-
edge with Data response will be issued. This response consists of an ACSII
' A ' followed by data and checksum.
Example:
slave:
Failure
All failure responses consist of an ASCII 'N' followed by a two byte hexa-
decimal ASCII failure code. Defined failure codes are given in the table
below.
Example:
slave:
Failure Code
01
02
05
A[CR]
A0123456A6[CR]
N01[CR]
Description
unknown command
checksum failure
Parameter out of range
Serial Communications | A-3