Serial Communications | A-5
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: Access is as follows:
F Float r read only
H Hexadecimal w write only
U Unsigned decimal 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.
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