Ametek CEM/Humox, User Manual

Page: 116 / 136

A-4 | Thermox CEM/Humox Analyzer
Development Serial Communication Commands
These commands are used during initial serial communication design.
Echo (A)
The echo command is used to test the serial protocol and line integrity. Any text
sent to the Series 2000 Controller is echoed back to the host.
Bad Command (B)
Just returns a bad command (error code 01) reply.
Acknowledge (C)
Returns a simple acknowledge. This command can also be used later to check that
the controller is on-line and ready to communicate.
Data Format (J)
This command is used to check how data is output through the serial link. For each
variable that is accessible through the Read Number and Write Number commands,
a string is returned that describes the format of the number. This response data
consists of three characters:
Format Access Location
Where format is:
F Float
H Hexadecimal
U Unsigned decimal
Access is as follows:
r read only
w write only
b read/write
Location is:
r RAM
e EEPROM
Due to the nature of EEPROM memory, each location in the memory has a limited
number of writes allowed (approximately 10,000). The location character can be
used to determine where the data is stored internally to the Series 2000 Controller
and act accordingly.