Celestron CGE1100, CGE925, CGE800 manual Additional RS232 Commands, Reset The Position Of Azm Or Alt

Additional RS232 Commands

Send Any Track Rate Through RS232 To The Hand Control

1.Multiply the desired tracking rate (arcseconds/second) by 4. Example: if the desired trackrate is 150 arcseconds/second, then TRACKRATE = 600

2.Separate TRACKRATE into two bytes, such that (TRACKRATE = TrackRateHigh*256 + rackRateLow). Example: TrackRateHigh = 2 TrackRateLow = 88

3.To send a tracking rate, send the following 8 bytes:

a.Positive Azm tracking: 80, 3, 16, 6, TrackRateHigh, TrackRateLow, 0, 0

b.Negative Azm tracking:80, 3, 16, 7, TrackRateHigh, TrackRateLow, 0, 0

c.Positive Alt tracking: 80, 3, 17, 6, TrackRateHigh, TrackRateLow, 0, 0

d.Negative Alt tracking: 80, 3, 17, 7, TrackRateHigh, TrackRateLow, 0, 0

4.The number 35 is returned from the handcontrol

Send A Slow-Goto Command Through RS232 To The Hand Control (note: Only valid for motorcontrol version 4.1 or greater)

1.Convert the angle position to a 24bit 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 = PosHigh*65536 + PosMed*256 + PosLow). Exampe: PosHigh = 156, PosMed = 113, PosLow = 199

3.Send the following 8 bytes:

a.Azm Slow Goto: 80, 4, 16, 23, PosHigh, PosMed, PosLow, 0

b.Alt Slow Goto: 80, 4, 17, 23, PosHigh, PosMed, PosLow, 0

4.The number 35 is returned from the handcontrol

Reset The Position Of Azm Or Alt

1.Convert the angle position to a 24bit number, same as Slow-Goto example.

2.Send the following 8 bytes:

a.Azm Set Position: 80, 4, 16, 4, PosHigh, PosMed, PosLow, 0

b.Alt Set Position: 80, 4, 17, 4, PosHigh, PosMed, PosLow, 0

3.The number 35 is returned from the handcontrol

4.Note: If using Motorcontrol version less than 4.1, then send:

a.Azm Set Position: 80, 3, 16, 4, PosHigh, PosMed, PosLow, 0

b.Alt Set Position: 80, 3, 17, 4, PosHigh, PosMed, PosLow, 0

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