Celestron CGEM DX 1400 HD Computerized Telescope CGEM DX Mount Manual - Page 27

Appendix C - RS-232 Connection Description Echo Goto Azm-Alt Goto Ra-Dec Get Azm-Alt Get RA-Dec Cancel Goto Is Goto in Progress Is Alignment Complete Commands below available on version 1.6 or later HC version Stop/Start Tracking 32-bit goto RA-Dec 32-bit get RA-Dec Commands below available on version 2.2 or later 32-bit goto Azm-Alt 32-bit get Azm-Alt PC Command ASCII Kx B12AB, 4000 R34AB, 12CE Z E M L J V Tx x = 0 (Tracking off) x = 1 (Alt-Az on) x = 2 (EQ-N) x = 3 (EQ-S) r34AB0500,12CE0500 e b34AB0500,12CE0500 z Hand Control Response x# # # 12AB, 4000# 34AB, 12CE# # 0# or 1# 0# or 1# Notes Useful to check communication 10 characters sent. B=Command, 12AB=Azm, comma, 4000=Alt. If command conflicts with slew limits, there will be no action. Scope must be aligned. If command conflicts with slew limits, there will be no action. 10 characters returned, 12AB=Azm, comma, 4000=Alt, # Scope must be aligned 0=No, 1=Yes; "0" is ASCII character zero 0=No, 1=Yes 22 # # 34AB0500,12CE0500# Two bytes representing V2.2 Alt-Az tracking requires alignment The last two characters will always be zero. # 34AB0500,12CE0500# The last two characters will always be zero. 4-4 Modular Phone Jack The cable required to interface to the telescope has an RS-232 male plug at one end and a 4-4 telephone jack at the other end. The wiring is as follows: DB9 Pin 3 PC Transmit 25 DB9 Pin 2 PC Recieve DB9 Pin 5 Ground