ZF Marine ClearCommand 9000 Series, Installation, Operation And Troubleshooting Manual

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TROUBLESHOOTING
Page B6-2
• The Command Signal at Full Ahead is 82- 84% of the Reference
Voltage when measured at the Station terminal block. The actual
value read by the Processor is 2% below that value or 80- 82% of
1023 A/D Counts (821- 841 A/D).
• The Command Signal at Full Astern is 17 - 19% of the Reference
Voltage when measured at the Station terminal block. The actual
value read by the Processor is 2% below that value or 15- 17% of
1023 A/D Counts (153- 173 A/D).
• Since the Command Signal is based on a percentage of the Refer-
ence Voltage, the distance of the Control Head from the Processor
has no impact on the performance of the system.
• The amount of voltage drop, due to current flow, is the same for
both the Reference and Command Voltages.
• The relationship between the Reference and Command Voltages
when thought of as a percentage, will remain the same regardless
of distance. For instance, here are two examples.
Example 1
Reference Voltage 5.00 VDC1023 A/D Counts
Command Voltage2.45 VDC501 A/D Counts
Example 2
Reference Voltage4.80 VDC1023 A/D Counts
Command Voltage2.35 VDC501 A/D Counts
As you can see by the examples, even though the Command Volt-
ages are different between Examples 1 and 2, the resulting A/D
counts, are the same because of the different Reference Voltages.
This would result in the Processor commanding the identical out-
puts (Clutch & Throttle) in both cases.
A) The A/D count for a specific Control Head’s lever can be
seen on the Processor’s Display by following the steps out-
lined in Section B4, page B4-1.
B) Once the appropriate remote station is reached, ensure that
the displayed A/D Count represents the Neutral/Idle posi-
tion (485- 505 A/D counts). Command will not be accepted
unless the Control Head’s lever is at the Neutral/Idle posi-
tion.
The following table shows the appropriate A/D Counts for various
Control Head lever positions:
NOTE: T
HE
A/D
VALUES LISTED FOR
F
ULL
A
HEAD AND
F
ULL
A
STERN REPRESENT THE POINT WHERE
MAXIMUM THROTTLE IS REACHED
. T
HE
A/D
COUNT WHEN THE
C
ONTROL
H
EAD LEVER IS PHYSI
-
CALLY AT IT
’
S MAXIMUM POINT WILL BE HIGHER
,
BUT MAY NOT EXCEED THE OUT
-
OF
-
RANGE VAL
-
UES LISTED IN
T
ABLE
B6-3:,
PAGE
B6-2.
Table B6-3: Control Head Lever A/D Counts
Control Head Lever Position A/D Count
Lever Out of Range Low 100
Full Astern 153 - 173
Neutral/ Idle 485 - 505