GTCO Roll-Up II - Users Guide - Manual (Page 37)

Roll-Up II 37
Read Current Coordinate Code: hex 02 (Ctrl-B)
The Read Current Coordinate causes the Roll-Up II to output a coordinate while it is in
Remote Request Mode. This command can be sent to the Roll-Up II only when it is
digitizing and only when Remote Request Mode is in Command Mode. Please note that
this command is not two ASCII characters. It is the one-byte-long STX character, CTRL-B
(hex 02). Roll-Up II responds to the Read Current Coordinate command by transmitting
one format.
Set Increment Value Code: IV
In Line Incremental and Continuous Incremental modes, the Roll-Up II outputs a coordinate
when the transducer is moved beyond a certain incremental distance in either the X or Y
direction. The default increment is 0.01”. The Set Increment Value command allows the
user to select the distance which the transducer must move to initiate coordinate output.
It works as follows:
1. Enter Command Mode by sending a CTRL-A.
2. After receiving the > prompt, send IV and a <CR> (hex 0D).
3. The Controller will respond with a <.
4. After receiving the <, send a three-digit string ranging from 000 to 999. This string
represents an increment value of 0.000 to 0.999 inch.
5. When the Controller receives the last character it will respond with a > prompt and
await the next command.
Send Coordinates 0,0 When Transducer is Out of Active Area
No Output When Transducer is Out of Active Area Code: OP
Code: IP
Certain situations require that the Roll-Up II be able to send a coordinate when the
transducer is out of the active area. Command OP permits coordinates to be sent under
this condition. Since valid coordinates are not available when the transducer is out of the
active area, coordinates 0,0 are substituted in the format. When this command has been
executed, digitizing modes operate normally, whether the transducer is in the active area
or not. Command IP returns Roll-Up II to the default condition, in which coordinates are
sent only when the transducer is in the active area.