Motortech MIC500 - Set Ignition Timing Limits

Rev. 01/2015 93
8.5.13 Set Ignition Timing Limits
To prevent engine damage caused by the addition of various parameters in the ignition timing
adjustment, you can set limits which may not be exceeded for ignition timing. MAX ADV
indicates the earliest possible firing time, MAX RET the latest possible firing time. Ignition timing
adjustments which extend beyond these limits will only be applied up to the set limit.
The limits are specified separately for the two schedules.
The limits for schedule B can only be configured if you select the function Switch A/B for the
digital input (see Select Function for Digital Input on page 87).
Value range:
– The maximum possible range of the ignition timing limits is 38°.
– The earliest possible timing (MAX ADV) must be at least 2° later than the reset position
(parameter Reset BTDC, see Set Reset Position on page 84).
– The latest possible timing (MAX RET) may not be more than 40° later than the reset
position (parameter Reset BTDC).
 If Reset BTDC is set at 50°, the ignition timing limit must be set within the range of
10° BTDC to 48° BTDC. Values later than 10° are not possible.
– The value for the earliest ignition timing (MAX ADV) must be equal to or earlier than the
value for the latest ignition timing (MAX RET).
– Ignition timing limits ATDC cannot be set.
– Values may have up to two decimal places.
 Enter decimal places with a period as the delimiter, e.g. 35.55.
Proceed as follows:
Set Earliest Ignition Timing for Schedule A
Open parameterization level ->
[F2] to MAX ADV A -> [F1] ->
Enter earliest ignition timing ->
[Enter] -> [F5]