Owner manual

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Additional RS-232 Commands
Sending a track rate through RS-232 to the hand control
1. Multiplythedesiredtrackingrate(arcseconds/second)by4.Forexample:ifthedesiredtrackrateis 120 arc seconds/second
 (approximately8timesofsiderealrate),thentheTRACKRATE= 480.
2. Separate TRACKRATEintotwobytes,suchthat(TRACKRATE=TrackRateHighByte*256 + TrackRateLowByte).
For example TRACKRATE =480,thenTrackRateHighByte = 1,TrackRateLowByte = 224.
3. Tosendatrackingrate,sendthefollowing8bytes:
 • PositiveAzmtracking:80, 3, 16, 6, TrackRateHighByte, TrackRateLowByte, 0, 0
 • NegativeAzmtracking:80, 3, 16, 7, TrackRateHighByte, TrackRateLowByte, 0, 0
 • PositiveAlttracking:80, 3, 17, 6, TrackRateHighByte, TrackRateLowByte, 0, 0
 • NegativeAlttracking: 80, 3, 17, 7, TrackRateHighByte, TrackRateLowByte, 0, 0
4. The number 35 is returned from the hand control.
Sending a slow-Goto command through RS232 to the hand control
1. Converttheanglepositiontoa24-bitnumber.Example:ifthedesiredpositionis220,thenPOSITION_24BIT = (220/360)*224 =
10,252,743.
2. Separate POSITION_24BITintothreebytessuchthat(POSITION_24BIT = PosHighByte * 65536 + PosMedByte * 256 +
PosLowByte).Example:PosHighByte=156,PosMedByte=113,PosLowByte=199.
3. Send the following 8 bytes:
 • AzmSlowGoto:80, 4, 16, 23, PosHighByte, PosMedByte, PosLowByte, 0
 • AltSlowGoto:80, 4, 17, 23, PosHighByte, PosMedByte, PosLowByte, 0
4. The number 35 is returned from the hand control.
Resetting the position of Az or Alt
1. Converttheanglepositiontoa24-bitnumber,sameasSlow-Gotoexample.
2. Send the following 8 bytes:
 • AzmSetPosition:80, 4, 16, 4, PosHighByte, PosMedByte, PosLowByte, 0
 • AltSetPosition:80, 4, 17, 4, PosHighByte, PosMedByte, PosLowByte, 0
3. The number 35 is returned from the hand control.