MSD 7550 Installation

Hand Held Programmer/Monitor

for the MSD Programmable Digital-7 Ignition Control

PN 7550

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These instructions are meant to illustrate the operation of the Programmer/Monitor and how to navigate
its program menus. Reading the instructions as you operate the Programmer to become familiar with
the screens and menus will assist in your programming.

Parts Included

1 – Programmer/Monitor, PN 7550

The PN 7550 Programmer connects to the MSD Programmable Digital-7 Ignition Control with the
supplied 9-pin wiring harness. It can be left connected when making passes or removed. If you choose
to remove it after making changes in the program, you must go to the Save menu to store the new
programs in the Ignition before disconnecting the harness.

There are six buttons on the PN 7550 (Figure 1). The top four are used for programming all of the
features of the PN 7530 Ignition. The two Launch Control buttons put you directly to the Launch RPM
setting adjustment for last minute starting line changes.

ENTER – This is used to open the selected field for further
programming or to load a new program.

NEXT – Pressing this button moves the cursor to the next field.
After making an adjustment to a program, pressing NEXT will
take you to the Save menu.

Up (⇑) and Down (⇑) Arrows – These buttons are used to change
the settings of programs such as rpm or timing. Pressing the up
button increases the rate while the down arrow lowers it.

LAUNCH REV LIMITER

Pressing one of these buttons takes you directly to the RPM
Launch limit for quick starting line changes. Once at this menu,
use the arrow keys to adjust the rpm limit. Note that this rpm
limit will automatically be saved without having to go to the Save
menu.

M S D   •   W W W . M S D P E R F O R M A N C E . C O M   •   ( 9 1 5 )   8 5 7 - 5 2 0 0   •   F A X   ( 9 1 5 )   8 5 7 - 3 3 4 4

Figure 1 Button Operation.

2 INS T A LLA T I ON I N STRU C T ION S

MENU TREE

The following menu tree shows the different screens and programs of the Ignition and Monitor.

Figure 2 The Menu Tree.

M S D   •   W W W . M S D P E R F O R M A N C E . C O M   •   ( 9 1 5 )   8 5 7 - 5 2 0 0   •   F A X   ( 9 1 5 )   8 5 7 - 3 3 4 4

INS T A LLA T I ON I N STRU C T ION S 3

When you first turn the ignition on, the Programmer will display a short introduction with MSD, the
ignition version and other information. You can bypass this to get to the Main Menu by pressing Enter.

MAIN MENUS

The Main Menus are shown in Figure 3. Note the * on the right side of the screen. This means that
there is more to this menu above or below list shown. By pressing ⇑ you will get to the next part of
the Main Menu. Note that three screens comprise the Main Menu.

NAVIGATING THE MENUS

To move around to the options in a menu, use the Next button. Whichever
subject’s first letter is flashing, that is the active choice. That is, when you press
Next, the next screen will be that choice.
Also note that there is an Previous symbol (^) in the left corner of the monitor.
This will take you to the previous menu. When this is flashing and you select
Enter, you will be taken to the previous screen.

SAVE MENU

This is the Menu that you have to go to in order to change a program. When you
hit Enter or Next after making a change in a program, it automatically takes you
to the Save Menu. Note that there is another screen below the one that comes
up (as indicated by the lower *). There are five choices at the Save Menu:

Figure 3 Main Menus.

SAVE MENU

Save

Cancel

Default Item

Default Table

Default Product

When the Save screen comes up, the Save command is already flashing. By hitting Enter (or Next)
the value will be saved and the monitor will display the new value.

RPM Example:

Following is an example of how to edit the MaxRev rpm limit (Figure 4).

Main Menu

Press Next until RevLim flashes. Then press Enter.

This will save the new program value in the Ignition.

This will restore the previous value.

This restores the program to the default value.

Restores the complete table back to the default value. This is handy in
cases such as the Launch Curve where there are numerous values.

Entering this will restore EVERY PROGRAM back to default properties.
Take note that you will start completely over by entering this!

M S D   •   W W W . M S D P E R F O R M A N C E . C O M   •   ( 9 1 5 )   8 5 7 - 5 2 0 0   •   F A X   ( 9 1 5 )   8 5 7 - 3 3 4 4