Siemens Simatic S7-1500 Manuel - Page 26

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Diagnostics

7.2 Diagnostics alarms

Diagnostics alarm

Communication error

(LINK LED is permanently

on or off)

Communication error

(LINK LED is permanently

off)

Invalid/inconsistent firm-

ware present

Diagnostic interrupt

For an incoming or outgoing event, the module triggers a diagnostics interrupt if this is

configured accordingly in STEP 7 (TIA Portal). The CPU interrupts user program execution and

executes the diagnostic interrupt OB. The event that triggered the interrupt is entered in the

start information of the diagnostic interrupt OB.

The module generates a diagnostic interrupt at the following event:

• Parameter assignment error

• Missing supply voltage

You can find detailed information on the event in the organization block with the "RALRM"

instruction (read additional interrupt info) and in the STEP 7 online help.

Correct coding of the end of line in the configuration file

If the LINK LED is permanently off and Bit 3 in status byte 1 of the PII is on, this could be due

to errors in the configuration file.

Check for correct end of lines in the "network.conf" configuration file.

Linux/Unix, Windows and OS X code the end of line differently:

• <Line Feed> [Bytecode: LF; ASCII: 0x0A, symbolic: \n] under Linux/Unix,

• <Carriage Return> [Bytecode: CR, ASCII: 0x0D, symbolic: \r] under OS X,

• <Carriage Return><Linefeed> [Bytecode: CR/LF] under Windows.

Error code

Meaning

Internal communication error in the

module:

Interrupted data connection between

the AI-capable processor and the

backplane bus.

Internal communication error in the

module:

Configuration file "network.conf" is

unreadable.

11B

Loaded firmware versions for the

backplane bus and the module are not

compatible

Corrective measures

Restart the module

If the communication error still exists

after the restart, perform the firmware

update again.

Check the "network.conf" configura-

tion file. The file must be in Linux

format.

Read the last paragraph in this section.

Perform both firmware updates again

and ensure that the version number is

the same for both updates.

Technology Module TM NPU

Equipment Manual, 09/2020, A5E46384784-AA