Rockwell-automation 150 USE MN/SMC DIALOG + CONTROLLER Manual de usuario descargar pdf (Pagina 70)

4-6

Programming

Parameter Management

Before you begin programming, it’s important to understand how the

controller memory is:

• structured within the SMC Dialog Plus controller

• used on power-up and during normal operation

Refer to Figure 4.2 and the explanations below.

Figure 4.2 Memory Block Diagram

Random Access Memory (RAM)

This is the work area of the controller after it is powered up. When

you modify parameters in the Program mode, the new values are

stored in RAM. When power is applied to the controller, parameter

values stored in the EEPROM are copied to RAM. RAM is volatile

and the values stored in this area are lost when the controller is

powered down.

Read-only Memory (ROM)

The SMC Dialog Plus controller comes with factory default

parameter values. These settings are stored in nonvolatile ROM and

are displayed the first time you enter the Program mode.

Electrically Erasable Programmable Read-only Memory

(EEPROM)

The SMC Dialog Plus controller provides a nonvolatile area for

storing user-modified parameter values in the EEPROM.

EEPROM RAM ROM

1 2 ... 65 66 67 68 69 70 71 72 73 74 75 ... 188 189

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Rockwell-automation 150 USE MN/SMC DIALOG + CONTROLLER Manual de usuario Pagina 70