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Fieldbus Controller 750-837, /02x-000, 750-838, /02x-000 • 101

LED Display

3.1.8 LED Display

The controller possesses several LED’s for on site display of the coupler operating status or the complete node.

CANopen

01 02

 

CANopen

01 02

 

STOP

A

C

STOP

A

A

 

C

 

C

RUN

B

A

RUN

B

B

D

D

TX

24V 0V

 

TX

24V 0V

 

OVERFLOW

 

OVERFLOW

 

RX

 

 

RX

 

 

I/O

 

 

I/O

 

 

USR

 

 

USR

 

 

Fig. 3-18: Display elements

 

 

g083702x

Here is a description of the two groups of LEDs.

The first group = fieldbus contains the solid colored LEDs with the notation STOP (red), RUN (green), Tx-Overflow (red) and Rx-Overflow (red) displays the operating status of the communication via CAN.

The second group = module bus consists of the three-color I/O LED (red/green/orange). The module bus status and the software exception codes are displayed by this LED.

The three-color USR-LED can be accessed by a user program in the programmable fieldbus controller.

LEDs located on the right-hand side in the coupler feed section show the status of the supply voltage.

WAGO-I/O-SYSTEM 750

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102• Fieldbus Controller 750-837, /02x-000, 750-838, /02x-000 LED Display

3.1.8.1 Fieldbus status

The upper four LED´s (STOP, RUN, Txund Rx-Overflow) signal the operating conditions of the CAN communication.

STOP

RUN

TXOVERF

RXOVERF

Meaning

Remedy

OFF

OFF

OFF

OFF

No function or self-

check supply

 

 

 

 

test

(24V and 0V),

 

 

 

 

 

wait for self-test

OFF

SLOW

X

X

Module is in the

 

 

FLASHING

 

 

state PRE-

 

 

 

 

 

OPERATIONAL

 

OFF

ON

X

X

Module is in the

 

 

 

 

 

state

 

 

 

 

 

OPERATIONAL

 

ON

OFF

X

X

Module is in the

Check in the event

 

 

 

 

STOP state or fatal

of a fieldbus inde-

 

 

 

 

fieldbus independent

pendent error, reset

 

 

 

 

error (i.e. a module

the node, check the

 

 

 

 

was removed),

same in the event of

 

 

 

 

incorrect configura-

a configuration error

 

 

 

 

tion

 

X

X

X

ON

CAN receiver buffer

Increase the time

 

 

 

 

is full. Data loss is

span between 2

 

 

 

 

likely.

protocols.

X

X

ON

X

CAN transmitter

Check the data sizes

 

 

 

 

buffer is full. Data

of the bus system.

 

 

 

 

loss is likely.

Increase the transmit

 

 

 

 

 

priority of the

 

 

 

 

 

Module.

X

X

FAST

FAST

CAN Controller

Check baud rate and

 

 

FLASHING

FLASHING

exceeded the Warn-

bus connection,

 

 

in turns with

in turns with

ing Level, to many

install min. 2 mod-

 

 

RXOVERF

TXOVERF

error messages

ules in the network.

OFF

FAST

X

X

Module is in the

Change into the state

 

FLASHING

 

 

state PRE-

OPERATIONAL

 

 

 

 

OPERATIONAL,

and restart

 

 

 

 

Sync/Guard Mes-

Sync/Guard mes-

 

 

 

 

sage/Heartbeat failed

sage/Heartbeat

FAST

FAST

X

X

Module is in the

Restart Sync/Guard

FLASHING

FLASHING

 

 

state

message/Heartbeat

 

 

 

 

OPERATIONAL,

 

 

 

 

 

Sync/Guard Mes-

 

 

 

 

 

sage/Heartbeat failed

 

FAST

OFF

X

X

Module is in the

Change into the state

FLASHING

 

 

 

state STOP,

OPERATIONAL

 

 

 

 

Sync/Guard Mes-

and restart

 

 

 

 

sage/Heartbeat failed

Sync/Guard mes-

 

 

 

 

 

sage/Heartbeat

WAGO-I/O-SYSTEM 750

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Fieldbus Controller 750-837, /02x-000, 750-838, /02x-000 • 103

LED Display

3.1.8.2 Node Status – Blink code from the 'I/O' LED

LED

Color

Meaning

IO

red /green

The 'I/O' LED indicates the node operation and signals faults occur-

 

/orange

ring.

 

 

 

The coupler starts after switching on the supply voltage. The "I/O" LED flashes red. Following an error free start up the "I/O" LED changes to green steady light.

In the case of a fault the "I/O" LED continues blinking red. The fault is cyclically displayed with the blink code.

Detailed fault messages are displayed with the aid of a blink code. A fault is cyclically displayed with up to 3 blink sequences.

•The first blink sequence (approx. 10 Hz) starts the fault display.

•The second blink sequence (approx. 1 Hz) following a pause. The number of blink pulses indicates the fault code.

•The third blink sequence (approx. 1 Hz) follows after a further pause. The number of blink pulses indicates the fault argument.

Fig. 3-19: Signalling of the LED for indication of the node status

g012111e

After clearing a fault, restart the coupler by cycling the power.

WAGO-I/O-SYSTEM 750

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104• Fieldbus Controller 750-837, /02x-000, 750-838, /02x-000 LED Display

I/O

Meaning

green

Data cycle on the internal bus

 

 

off

No data cycle on the internal bus

 

 

red

Coupler hardware defective

 

 

red flashing

a) During startup of fieldbus controller: Internal bus being initialized,

 

b) After startup of fieldbus controller: General internal bus fault

 

 

red cyclic flash-

Fault message in case of an internal bus reset and an internal error.

ing

This fault message is indicated by an error code of three consecutive

 

flashing sequences. There is a short pause between each sequential

 

flash.

 

 

Fault message of the 'I/O' LED

1st blink sequence: Start of the Fault message

2nd blink sequence: Fault code

3rd blink sequence: Fault argument

Fault code 1: " Hardware and configuration fault "

Fault argument

Fault description

Trouble shooting

-

Invalid fieldbus cou-

Turn off the power supply of the

 

pler/controller parameter check-

node, reduce number of I/O mod-

 

sum

ules and turn the power supply on

 

 

again

1

Overflow of the internal buffer

Turn off the power supply of the

 

memory for the inline code

node, reduce number of I/O mod-

 

 

ules and turn the power supply on

 

 

again. If the error still exists, ex-

 

 

change the bus coupler.

2

I/O module(s) with unsupported

Detect faulty I/O module as fol-

 

data type

lows: turn off the power supply.

 

 

Place the end module in the middle

 

 

of the fieldbus node. Turn the

 

 

power supply on again.

 

 

– If the LED is still blinking, turn

 

 

off the power supply and place the

 

 

end module in the middle of the

 

 

first half of the node (towards the

 

 

coupler).

 

 

– If the LED doesn’t blink, turn off

 

 

the power supply and place the end

 

 

module in the middle of the second

 

 

half of the node (away from the

 

 

coupler).

 

 

Turn the power supply on again.

 

 

Repeat this procedure until the

 

 

faulty I/O module is detected.

 

 

Replace the faulty I/O module.

 

 

Ask about a firmware update for

 

 

the fieldbus coupler.

WAGO-I/O-SYSTEM 750

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Fieldbus Controller 750-837, /02x-000, 750-838, /02x-000 • 105

 

 

 

LED Display

 

 

 

 

 

 

3

Module type of the flash pro-

Turn off the power supply of the

 

 

 

gram memory could not be de-

node, exchange fieldbus coupler

 

 

 

termined / is incorrect

and turn the power supply on

 

 

 

 

again.

 

 

 

 

 

 

 

4

Error occurred when writing to

Turn off the power supply of the

 

 

 

flash memory

node, exchange fieldbus coupler

 

 

 

 

and turn the power supply on

 

 

 

 

again.

 

 

 

 

 

 

 

5

Error occurred when erasing

Turn off the power supply of the

 

 

 

flash sector

node, exchange fieldbus coupler

 

 

 

 

and turn the power supply on

 

 

 

 

again.

 

 

 

 

 

 

 

6

Changed I/O module configura-

Restart the fieldbus coupler by

 

 

 

tion determined after

turning the power supply off and

 

 

 

AUTORESET

on again.

 

 

 

 

 

 

 

7

Error occurred when writing to

Turn off the power supply of the

 

 

 

serial EEPROM

node, exchange fieldbus coupler

 

 

 

 

and turn the power supply on

 

 

 

 

again.

 

 

 

 

 

 

 

8

Firmware does not run on exist-

Turn off the power supply of the

 

 

 

ing hardware

node, exchange fieldbus coupler

 

 

 

 

and turn the power supply on

 

 

 

 

again.

 

 

 

 

 

 

 

9

Invalid checksum in the serial

Turn off the power supply of the

 

 

 

EEPROM

node, exchange fieldbus coupler

 

 

 

 

and turn the power supply on

 

 

 

 

again.

 

 

 

 

 

 

 

10

Initialization of serial EEPROM

Turn off the power supply of the

 

 

 

failed

node, exchange fieldbus coupler

 

 

 

 

and turn the power supply on

 

 

 

 

again.

 

 

 

 

 

 

 

11

Error occurred with read access

Turn off the power supply of the

 

 

 

to serial EEPROM

node, exchange fieldbus coupler

 

 

 

 

and turn the power supply on

 

 

 

 

again.

 

 

 

 

 

 

 

12

Time limit exceeded for access-

Turn off the power supply of the

 

 

 

ing the serial EEPROM

node, exchange fieldbus coupler

 

 

 

 

and turn the power supply on

 

 

 

 

again.

 

 

 

 

 

 

 

14

Maximum number of Gateway or

Turn off the power supply of the

 

 

 

Mailbox I/O modules exceeded

node, reduce number of Gateway

 

 

 

 

or Mailbox I/O modules and turn

 

 

 

 

the power supply on again.

 

 

 

 

 

 

 

Fault code 2: -not used-

 

 

 

Fault argument

Fault description

Trouble shooting

 

 

-

not used

-

 

 

 

 

 

 

WAGO-I/O-SYSTEM 750

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106• Fieldbus Controller 750-837, /02x-000, 750-838, /02x-000 LED Display

Fault code 3: "Internal bus protocol fault"

Fault argument

Fault description

Trouble shooting

-

Internal bus communication

If the fieldbus node comprises

 

malfunction; faulty device can’t

internal system supply modules

 

be detected

(750-613), make sure first that the

 

 

power supply of these modules is

 

 

functioning. This is indicated by

 

 

the status LEDs. If all I/O modules

 

 

are connected correctly or if the

 

 

fieldbus node doesn’t comprise

 

 

750-613 modules you can detect

 

 

the faulty I/O module as follows:

 

 

turn off the power supply of the

 

 

node. Place the end module in the

 

 

middle of the fieldbus node. Turn

 

 

the power supply on again.

 

 

– If the LED is still blinking, turn

 

 

off the power supply and place the

 

 

end module in the middle of the

 

 

first half of the node (towards the

 

 

coupler).

 

 

– If the LED doesn’t blink, turn off

 

 

the power supply and place the end

 

 

module in the middle of the second

 

 

half of the node (away from the

 

 

coupler).

 

 

Turn the power supply on again.

 

 

Repeat this procedure until the

 

 

faulty I/O module is detected.

 

 

Replace the faulty I/O module. If

 

 

there is only one I/O module left

 

 

but the LED is still blinking, then

 

 

this I/O module or the coupler is

 

 

defective. Replace defective com-

 

 

ponent.

 

 

 

WAGO-I/O-SYSTEM 750

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Fieldbus Controller 750-837, /02x-000, 750-838, /02x-000 • 107

LED Display

Fault code 4: "Internal bus physical fault"

Fault argument

Fault description

Trouble shooting

-

Error in internal bus data com-

Turn off the power supply of the

 

munication or interruption of the

node. Place an I/O module with

 

internal bus at the coupler

process data behind the coupler

 

 

and note the error argument after

 

 

the power supply is turned on. If

 

 

no error argument is given by the

 

 

I/O LED, replace the coupler.

 

 

Otherwise detect faulty I/O mod-

 

 

ule as follows: turn off the power

 

 

supply. Place the end module in

 

 

the middle of the fieldbus node.

 

 

Turn the power supply on again.

 

 

– If the LED is still blinking, turn

 

 

off the power supply and place the

 

 

end module in the middle of the

 

 

first half of the node (towards the

 

 

coupler).

 

 

– If the LED doesn’t blink, turn off

 

 

the power supply and place the end

 

 

module in the middle of the second

 

 

half of the node (away from the

 

 

coupler).

 

 

Turn the power supply on again.

 

 

Repeat this procedure until the

 

 

faulty I/O module is detected.

 

 

Replace the faulty I/O module.

 

 

If there is only one I/O module left

 

 

but the LED is still blinking, then

 

 

this I/O module or the coupler is

 

 

defective. Replace defective com-

 

 

ponent.

 

 

 

n*

Interruption of the internal bus

Turn off the power supply of the

 

after the nth process data module.

node, exchange the (n+1)th process

 

 

data module and turn the power

 

 

supply on again.

 

 

 

WAGO-I/O-SYSTEM 750

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108• Fieldbus Controller 750-837, /02x-000, 750-838, /02x-000 LED Display

Fault code 5: "Internal bus initialization fault"

Fault argument

Fault description

Trouble shooting

n*

Error in register communication

Turn off the power supply of the

 

during internal bus initialization

node and replace nth process data

 

 

module and turn the power supply

 

 

on again

Fault code 6: " Project engineering node configuration fault "

 

Fault argument

 

 

Fault description

 

 

Trouble shooting

 

 

n

 

 

Wrongly configured I/O module

 

 

Check the Spacer module mapping

 

 

 

 

 

in the Spacer module mapping

 

 

 

 

 

 

 

 

 

 

 

 

 

Fault code 9: " CPU exception fault "

 

 

 

 

 

Fault argument

 

 

Fault description

 

 

Trouble shooting

 

 

1

 

 

Invalid program instruction

 

 

Program sequence malfunction.

 

 

 

 

 

 

 

 

Please contact the WAGO I/O

 

 

2

 

 

Stack overflow

 

 

 

 

 

 

 

 

support

 

3Stack underflow

4Invalid event (NMI)

Fault code 10: "PLC program fault "

Fault argument

Fault description

Trouble shooting

1

Invalid offset address for digital

Correct the offset address in the

 

inputs

appropriate function block.

2Invalid offset address for digital outputs

Fault code 11: "Gateway-/Mailbox I/O module fault"

Fault argument

Fault description

Trouble shooting

1

Maximum number of Gateway

Turn off the power supply of the

 

modules exceeded

node, reduce number of Gateway

 

 

modules and turn the power supply

 

 

on again.

 

 

 

2

Maximum size of Mailbox ex-

Reduce the Mailbox size.

 

ceeded

 

 

 

 

3

Maximum size of process image

Reduce the data width of the

 

exceeded due to the put Gateway

Gateway modules.

 

modules

 

 

 

 

* The number of blink pulses (n) indicates the position of the I/O module. I/O modules without data are not counted (e.g. supply module without diagnosis)

Example: The 13th I/O module has been removed.

1.The I/O-LED starts the fault display with the first blink sequence (approx. 10 Hz).

2.The second blink phase (approx. 1 Hz) follows the first pause. The I/O-LED blinks four times and thus signals the fault code 4 (internal bus data fault).

3.The third blink sequence follows the second pause. The I/O-LED blinks twelve times. The fault argument 12 means that the internal bus is interrupted after the 12th I/O module.

WAGO-I/O-SYSTEM 750

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