IAI America TTA User Manual
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6-1-3.
Handling All Data by the Controller with Extended Data
When the controller with extended data (see Table 6-1, Applicable Models) handles all data, send a message with controller
function specification word 9 of “271h: Controller function specification 2” set to 0001h (extended data (SEL programs,
programs steps, position data) IAI protocol query and change enable specification).
In case “271h: Controller function specification 2” will not be sent, the data enclosed by ( ) in Table 6-1 can still be queried and
changed. However, if the controller handles data outside of the range, a “684: Extended data access error (at IAI protocol
reception)” is generated. Additionally, because “271h: Controller function specification 2” will be disabled if the controller is
powered OFF, a software reset is received or an IAI protocol (format A (old protocol)) “Version query” is received, it is
necessary to resend it.
“271h: Controller function specification 2” is not supported for all of the applicable models listed on the cover page. Be sure to
send it after confirming the supported models and the support start version. For more details about the supported models and the
support start version, refer to 4-1, “Message List."
The following shows the “Controller function specification 2” transmission sequence.
Send controller function
specification 2 command
(271h)
All data can be used
hereafter
Error handling, retry, etc.
Start
communication
Normal response
reception completed?