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Installation Instructions – Addendum
This addendum provides installation and operating instructions specific to the Altronic
CD200D Unit – 791090-xR ignition system. It is intended as supplemental informa-
tion to the CD200D Installation Instructions.
(Section 9)
Remote (RMT) Engine Control Configuration (green background entries in CD200D
Unit - 791090-xR Modbus Terminal Program).
CD200D Unit – 791090-xR was designed to extend the life of EEPROM for Remote
Control Operations. By introducing RAM only (RMT) Registers for Remote Engine
Control Systems, every write to these registers are not committed to EEPROM. On
Power up initialization and on Engine stops, these Remote control registers (TABLE
12.11 and 12.12) are properly pre-loaded from Default control registers (TABLE
12.7). These Remote control registers are also purposely grouped together for conve-
nient single READ/ WRITE from and to Remote Engine Control Systems.
Default Engine Control Configuration (orange background entries in CD200D Unit -
791090-xR Modbus Terminal Program).
To maintain the same Engine Control configurations at startup, 3 Default Engine Con-
trol registers are committed to EEPROM every write. Frequent write to these entries
are not recommended due to EEPROM write cycle wear.
9.20
Engine Control Energy Selection
9.20.1 RMT Energy (RAM ONLY):
Default Energy (section 9.20.2) is pre-loaded to this RMT Energy on initializa-
tion and on engine stop.
There are four RMT Energy settings for CD200D Unit - 791090-xR
Energy 0
Vcap = 150 volts
Energy 1
Vcap = 160 volts
Energy 2
Vcap = 170 volts
Energy 3
Vcap = 180 volts
This voltage can only be measured using device with an input impedance of 1
megaohm or higher with no other device connected.
9.20.2 Default Energy:
This Default Energy Selection resides in NON-VOLATILE memory section.
Frequent write to this Default Energy Selection is not recommended due to
memory wear out.
9.21
Engine Control Global Retard
9.21.1 RMT Global (RAM ONLY):
Default Global Retard (section 9.21.2) is pre-loaded to this RMT Global Retard
on initialization and on engine stop.
9.21.2 Default Global:
This Default Global Retard resides in NON-VOLATILE memory section. Fre-
quent write to this Default Global Retard is not recommended due to memory
wear out.
9.22
Engine Control Individual Retard
9.22.1 RMT Cylinder CAL (RAM ONLY):
These numeric entries configure the amount of individual offset timing retard
added to the global timing for each individual output. Entry range is 0 to 50
degrees of engine retard (May be less for Slave pattern applications). Upon
Power on Initialization and on Engine Stops, all entries in this RMT Cylinder
CAL array are pre-loaded with the Default Indv Retard (section 9.22.2).
9.22.2 Default Indv:
This Default Indv Retard resides in NON-VOLATILE memory section. Frequent
write to this Default Indv Retard is not recommended due to memory wear out.
CD200D II 4-17 Addendum
All rights reserved © ALTRONIC, LLC 2017
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