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Serial Communications | A-5
Development Serial Communication Commands
These commands are used during initial serial communication design.
echo (a)
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)
Check how data is output through the serial link.
For each variable that is accessible through the Read Number and Write Num‑
ber commands, a string is returned that describes the format of the number. This
response data consists of three characters:
Format access location
F Float
H Hexadecimal
U Unsigned decimal
r read only
w write only
b read/write
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.