User's Manual

SECTION III OPERATION
SM 7063 07/97 3-34
Note 2
:
Bit State Description
7 N/A Always set to 0.
t N/A Always set to 1.
u N/A Always set to 1.
v N/A Always set to 1.
w N/A Always set to 1.
x N/A Always set to 1.
y HOT Emergency (CDU Emergency Switch Status)
0 CDU Emergency Switch open (released).
1 CDU Emergency Switch closed (active).
z HOT Type (One or Two Way Front Unit, Always 1 for CDU)
0 One-Way type Front EOT Unit.
1 Two-Way type Front EOT Unit.
Note 3
:
EOT Pressure information. Pressure range is 0 to 127 PSI (1 PSI resolution). Bit 7 is always set to 0, bit 0
is the least significant bit (LSB).
Note 4
:
The CRC is a 16 bit code computed ONLY from Data Bytes 3, 4, and 5; the two Sync Bytes ("AA" bytes)
are excluded from the CRC calculation.
The CRC is computed according the specifications of CRC-CCITT, as implemented in X-MODEM-CRC
using the CCITT polynomial of 0x1021.
The high byte of the CRC is transmitted first.