Sl-I/F (Speedlite Interface) - Canon 580EXII Service Manual

1.4 sl-I/F (speedlite Interface)

The SL-I/F is an interface used for communicating with a personal computer to write
adjustment values into the speedlite's EEPROM during electrical adjustment.
1) sl-I/F specification and nomenclature
2) sl-I/F connection
1. Turn the power to the SL-I/F OFF and connect it with the personal computer with an RS-
232C cable (reverse type). When the correct cable is used and the power is turned ON, the
DTR lamp (green) lights.
2. Turn the flash unit OFF and connect it to the SL-I/F.
3. Start the adjustment software and follow the instructions shown on the screen.
4. Turn the SL-I/F ON. When it is turned ON, the BATT lamp (red) lights. Be careful when
using internal size-AA batteries.
Fig. 002 sl-I/F specification
Fig. 003 sl-I/F setting

Adjustments