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COMMUNICATION PROTOCOLS
1100: Not De
fi
ned
1101: Not De
fi
ned
1110: Other
1111: Not Available
Byte: 2
Retarder Control Method (SPN 557)
0 – DVB
1 – Konstandrossel
2 – Low/High Compression
3 – Low/Med/High Compression
255 — Not Con
fi
gured
Bytes: 3–4
Retarder Speed at Idle, Point 1 (SPN 546)
Resolution: 0.125 rpm/bit, 0 rpm offset
Byte: 5
Percent Torque at Idle, Point 1 (SPN 551)
Resolution: 1%/Bit, –125% offset
Bytes: 6,7
Maximum Retarder Speed, Point 2 (SPN 548)
Resolution: 0.125 rpm/Bit, 0 rpm offset
Byte: 8
Percent Torque at Maximum Speed, Point 2 (SPN 552)
Resolution: 1%/Bit, –125% offset
Bytes: 9,10
Retarder Speed, Point 3 (SPN 549)
Resolution: 0.125 rpm/bit, 0 rpm offset
Byte: 11
Percent Torque, Point 3 (SPN 553)
Resolution: 1%/Bit, –125% offset
Bytes: 12, 13
Retarder Speed, Point 4 (SPN 550)
Resolution: 0.125 rpm/bit, 0 rpm offset
Byte: 14
Percent Torque, Point 4 (SPN 554)
Resolution: 1%/Bit, –125% offset
Bytes: 15,16
Retarder Speed at Peak Torque, Point 5 (SPN 547)
Resolution: 0.125 rpm/bit, 0 rpm offset
Bytes: 17,18
Reference Retarder Torque (SPN 556)
Resolution: 1 Nm/Bit, 0 Nm offset
Byte: 19
Percent Torque at Peak Torque, Point 5 (SPN 555)
Resolution: 1%/Bit, –125% offset
6-66
All information subject to change without notice.
(Rev. 01/07)
7SA827 0701
Copyright © 2007 DETROIT DIESEL CORPORATION