Lightspeed CAT 860, User Manual

Page: 35 / 88

35
1. Overview
2. Setup & Use
3. Optional
Accessories
4. T
roubleshooting
5. W
arranty
, Safety
& Specifications
13. RS-232 SERIAL INTERFACE
PROGRAMMING
CONT’D
General Format for Query Command Exchange:
In this example the external controller sends query command packet to CAT
860. CAT 860 repeats back the action command packet in response which also
includes one or two imbedded <Param> characters. The <Param> characters
which are added to the query command packets contain the values of the perti-
nent internal CAT 860 registers.
Controller: <STX><CMD><EOT>
CAT 860:
<STX><CMD><Param><Param><EOT>
General Format for Aborted Command Exchange (Both Basic and Advanced
Command Sets:
In this example the external controller sends either an action or query command
to CAT 860 and the command is either corrupted or unsupported. The <Param>
characters can be absent.
Controller: <STX><CMD><Param><EOT>
CAT 860:
<NACK>
Note: It is expected that each button press from the serial controller would use
only a single command/query packet. If a single button press must issue a string
of multiple command/query packets then each packet must be separated by at
least a 10ms delay, or alternately, a new packet must wait until the CAT 860 issues
a response packet/character before it can be sent.