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Serial Interface Specifications
Apollo SL30 Installation Manual
59
APPENDIX E - SERIAL INTERFACE SPECIFICATIONS
This appendix includes the interface specifications for the RS-232 serial port. The RS-232
port can be used to input active and standby frequencies, and is used to input frequencies from
a remote source, such as the SL50/60 and 2001 GPS. The interface format conforms to
NMEA 0183 message format specifications.
INPUT COMMANDS
The following input command messages are supported:
• Input airport identifier associated with remote Comm frequency list
• Input Comm frequency data from a remote source
• Input VOR frequency data from a remote source
• End of VOR frequency list from a remote source
• Start of Localizer frequency list from a remote source
• Input Localizer frequency data from a remote source
• Request data output
• Set active VOR/LOC frequency data from a remote source
• Set standby VOR/LOC frequency data from a remote source
• Set standby COMM frequency data from remote source
• Set NAV audio mode
• Active COMM frequency
• Set Omni-Bearing Select (OBS) value from remote source
• DME sensor input
OUTPUT MESSAGES
SL30 output messages include:
• Reset status
• CDI, GSI, and flags
• Decoded OBS setting
• Radial from active VOR
• Radial from standby VOR
• Decoded station identifier
• Communications error
• NAV Receiver status
• NAV audio mode
• NAV microcontroller software version
• NAV DSP software version
• Comm transceiver status
• Comm software version
• ADC Data Output