Instruction Manual

QTI Page 6 of 13 Revision: A
Form #: 30Z0250 Effective Date: 16 December 2009
Message Serial Format
Decoded message is sent via RS-485:
RXM XX YYY ZZ<CR>, where XX = Message Type, YYY = ID code, and ZZ = status code; all values are
hexadecimal.
MESSAGE TYPE (XX)
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.
Examples of parity:
Good parity 0X (0000xxxx in binary)
Bad parity 8X (1
000xxxx in binary)
List of types:
MIDS X7
EMIDS/TRSS XD (EMIDS format if TRSS mode OFF (default) / TRSS format if TRSS ON)
REMBASS X6
NOTE: Because EMIDS and TRSS have the same message type, the message format is distinguished based on
whether TRSS mode is enabled (TRSS format) or disabled (EMIDS format).
The MCDT can receive MIDS and REMBASS messages at any time without setting the unit to a particular
mode. In addition, the unit can receive either EMIDS or TRSS messages, but the user must specify which for
the MCDT to expect since these two have the same message type.
ID CODE (YYY)
The unit ID code consists of three (3) hexadecimal characters, but only EMIDS messages use all three. MIDS,
TRSS and REMBASS are limited to ID codes 000-03F (63). EMIDS uses 000-3E7 (999).