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7-8

Using EEPROMs for Program Storage SIMATIC 545/555/575 System Manual

Configuring the CPU for Non-Volatile EEPROM Program Storage (continued)

The 575 CPUs require no configuration to store programs in non-volatile

memory. The 545/555–1105 and –1106 CPU models are configured at the

factory to enable the permanent on-board EEPROM as the default program

storage option. If you have not changed the board configuration, skip this

procedure, and refer to Section 7.3 to copy a program into the on-board flash

EEPROM.

If you have changed the board configuration at any time, follow these

instructions to configure the CPU for on-board EEPROM program storage.

NOTE: Ensure that the back-up battery is enabled and good (BATT GOOD

LED is on). Power to the base must be turned off and, without a functioning

back-up battery, your program may be lost when power is restored. You may

want to use TISOFT AUX 60 (SAVE PLC → ALL) or the corresponding

function in SoftShop to save your program to disk before proceeding.

1. Place the CPU in PROGRAM Mode.

2. Ensure that switch 9 on the CPU dipswitch is turned On (to the left).

This enables the back-up battery.

3. Turn off all user-supplied power to the 545/555 base.

CAUTION

The CPU is sensitive to, and can be damaged by, electrostatic discharge.

Personnel must make contact with a static-dissipative pad and/or wear a

grounded wrist strap when handling the CPU.

4. Remove the CPU from the base assembly and place the CPU

component-side-up on a static-dissipative surface.

5. If a portable EEPROM is installed in the socket on the CPU, you must

remove it in order to select on-board EEPROM program storage.

6. Set the jumper on header E20 to strap the pins marked “ON BRD

FLASH” (on-board flash memory) as shown in Figure 7-3.

7. Re-install the CPU in the base and turn the base power On. Refer to

Chapter 9 of this manual if the (E)EPROM fails to function correctly.

To copy a program into the on-board flash EEPROM, see Section 7.3.

Configuring the

CPU for On-Board

EEPROM Usage

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Siemens SIMATIC TI500 Especificaciones Pagina 208