Siemens Simatic M7-400 Manual do Utilizador descarregar pdf (Página 435)

100

101

CPUs for M7-400

11-7

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

Meaning of the Status and Fault LEDs

The status and fault LEDs are explained in Table 11-4 in the order in which they are

arranged on the CPU 486-3 and CPU 488-3 modules. The following status and

fault LEDs are available:

Table 11-4 Meaning of the Status and Fault LEDs on the CPU 486-3 and CPU 488-3

LED

Meaning Explanations

INTF (red)

EXTF (red)

Internal or external

fault indicator

Lights up in the event of:

• Hardware faults

• Firmware faults

• Programming faults

• Parameter assignment faults

• Computational faults

• Timer faults

• Memory card faults

• I/O faults

Use the programming device for precise fault-finding

(read out diagnostic buffer).

SD (green) Access to memory

card

Lights up if read or write access to the memory card is

taking place.

HD (green) Hard disk access Lights up if read or write access to the hard disk of the

mass storage module is taking place

USR1

(yellow)

Special LED for

the user program

(User)

Can be assigned by the user (see Programming

Manual)

USR2

(yellow)

Special LED for

the user program

(User)

RUN

(green)

“RUN” state LED Lights up if the system software is loaded and user

programs are running

(I/O access enabled).

STOP

(yellow)

“STOP” state LED • Lights up when the user program of the

programmable module is not controlling the

process (I/O access disabled)

• Flashes when a memory reset is requested or is

being performed

1 2 ... 430 431 432 433 434 435 436 437 438 439 440 ... 637 638

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