
Starting Up the System
8-3
SIMATIC 545/555/575 System Manual
2. Initialize the CPU by completing the following procedures:
• If you have not already done so, disable the CPU battery. (For
545/555 CPUs, turn off switch 9 on the CPU front dipswitch. For
575 CPUs, disconnect the battery.)
• Turn on power to the base.
• With the battery disabled and an unprogrammed (E)EPROM, the
CPU clears memory and enters PROGRAM mode.
• Enable the battery backup circuit by turning on switch 9. The
battery LED should light. The CPU is now initialized.
NOTE: If the battery LED does not come on, the battery is low. The LED
should be lit when the system is powered and a good battery is installed and
enabled.
3. Connect your programming device to one of the CPU communication
ports. Place the CPU in PROGRAM mode.
4. Using your programming device, enter the memory and I/O
configuration. Refer to Table 8-1, Table 8-2, Table 8-3, Table 8-4, or
Table 8-7, as appropriate.
5. Enter the user program. See the SIMATIC 545/555/575 Programming
Reference User Manual for programming information.
6. Use your programming device to JOG motors, solenoids, or other
positioning devices one at a time to establish correct rotation or
positioning.
After all the steps are performed and verified, place the CPU in RUN mode.
Comentarios a estos manuales