ABP

The ABP command sends a request to the ZY to set the absolute position parameter (the target destination, in absolute encoder counts) on one of the two LM628 axis controllers, in preparation for a move to this position.

Mnemonic:

ABsolute Position

Syntax:

ABP $<$n, p$>$

n:

axis value (0: azimuth, or 1: elevation)

p:

position in encoder counts $-(2^{30})$ to $(2^{30}) - 1$. If this value is not present, ABP returns an error. Current position can be obtained using ACP for actual position or DSP for desired position.

Return values:

Success:

ABP 1, n, p

Failure:

ABP 0, err_msg

n:

Axis value

p:

New target encoder position (pending move)

err_msg:

Should the command fail, this value will be an error message string, explaining the cause of failure.

Remarks:

It is important to keep in mind that the units used are encoder counts, and are therefore dependent on the encoder used. In order to complete the move, STT $<$n$>$ must be issued.

Example:

     send: ABP 0, 15000
  receive: ABP 1, 0, 1500

See also:

ACP, STT