User's Manual

QTI Page 7 of 15 Revision: C
Form #: 30Z0266 Effective Date: 5 October 2012
processor. Once awake the user can poll to get the new message. See the NEW command. If the
MCDR is still awake and the MCDR receives a new message, the shut-down mode will not occur until
the RS485 serial ID has been sent and acknowledged. The user’s application must respond or an
infinite loop condition would occur causing the MCDR to never shut down.
The MCDR communicates over RS-485. Commands must be followed by a carriage return (<CR>).
Settings are retained only until power is turned off unless the SAV command is used to store them to
the unit’s flash memory. When sending commands and queries, a two-digit hexadecimal checksum
(cs) can be used to check data integrity. Refer to the Checksum section after the Command List.
SETTINGS
38400 baud [fixed], No parity, 8 bit, 1 stop bit, No flow control
Message Serial Format
Decoded message is sent via RS-485:
RXM TT III SS R<CR> - Received message
TT = Message Type, III = ID code, and SS = status code; TT and SS are hexadecimal, and III is
decimal. R is the receive signal strength indicator; see RSS command.
Example: RXM 0D 244 0B
Message received – Received message type “EMIDS” with an ID code of 244 and a status code of
TEST, FAULT.
MESSAGE TYPE (TT)
The message type consists of two (2) hexadecimal characters. The first character shows the parity; the
most significant bit will be set if the parity is bad. The second character identifies the type.
Good Parity Bad Parity
MIDS 07h 87h
EMIDS 0Dh 8Dh
TRSS 1Dh 9Dh
REMBASS 06h 86h
Message Type Table
NOTE: TRSS and REMBASS message formats available upon request.