Pressure Systems 9046 - Manual (Page 39)

Pressure Systems, Inc. Model 9046 User’s Manual
Page 33 www.PressureSystems.com
5.2 No Operation (Command ’A’)
Purpose : This command has no internal module effect. It is used as a simple method to verify
proper communications to the Model 9046 module.
Command "A"
’A’ is the operation code.
Response "A" or "Nxx"
’A’ for acknowledge; ’N’ for negative acknowledge,
error code xx.
Description : This command is generally used as a simple ’NOP’ mechanism to verify proper
communications with a module.
Example :
Command module to acknowledge module power on:
"A"
Read following response:
"A"
Note
NUSS executes this command when you use its ’Connect’ function
to open a unique TCP Socket for communicating with the module. It
uses the command to determine if the module is currently adding a
"size prefix" (or not) to each command-response or stream. NUSS
always operates the module with this "prefix" enabled - and
restores the module to its original "prefix" state when it exits (and
disconnects each "connected" module from its unique TCP Socket).