Scanlab RTC 5 PC Interface Board Installation And Operation Manual page 551

Ctrl Command transform
Comments • For backward transformation of position values see
• The execution of transform must be preceded by a call to upload_transform. Addi-
tionally, position values should have been requested via get_values.
• If execution of transform results in an error (returned error code > 0), then no trans-
formation will occur (Sig1 and Sig2 then remain unchanged). Errors also include Ptr =
NULL (error code = 1) or errors resulting from prior, erroneous execution of
upload_transform
• If backward transformation of Z values is requested (Code bit #0 = 1), but only a 2D
correction table was assigned at the timepoint of the prior successful call to
upload_transform, then the offsets to the focal length and Z coordinates will be initial-
ized with 0 and the values A, B and C will be initialized with 0, 1, 0 (1-to-1 backward
transformation).
• For backward transformation of XY position values (Code bit #0 = 0), only the Z = 0
plane will be transformed. XY stretching and Z defocus resulting from Z deviations
(particularly with non-F-Theta systems) aren't taken into account.
• Because the command transform doesn't access any RTC
require explicit access rights to a specific board. If both the
and the queried data recorded via
stored on the PC, then offline operation of transform is also possible (then transform
doesn't require the presence of an RTC
• transform is not available as a multi-board command.
• The board-specific error variables LastError and AccError (see
87) are neither generated nor altered by transform.
® ®
RTC 4 RTC 5 new command
Even in the RTC
values) are in the 20-bit range and must, when necessary, be converted (by dividing by 16)
by the user.
Version info • Available beginning with version DLL 516, OUT 515, RBF 512
• Change with version DLL 517: parameter Code changed
References upload_transform, get_transform,
®
RTC 5 PC Interface Board
Rev. 1.9 e
10 Commands And Functions
(error code = 3).
get_values
®
® ®
5's RTC 4 compatibility mode, all back transformed values (including Z
get_values
page 154.
®
5 boards, calling it does not
upload_transform
or get_waveform have been binarily
5 board on the PCI bus).
"Error Handling", page
data
551