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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	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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Fieldbus Controller 750-837, /02x-000, 750-838, /02x-000 • 109

LED Display

3.1.8.3 Supply Voltage Status

LED	Color	Meaning
A	green	Status of the operating voltage – system

B or C	green	Status of the operating voltage – power jumper contacts
		(LED position is manufacturing dependent)

There are two green LEDs in the coupler supply section to display the supply voltage. The LED A (left above) indicates the 24 V supply for the coupler. The LED B (left down) or the LED C (right above) signals the supply to the field side, i.e. the power jumper contacts.

WAGO-I/O-SYSTEM 750

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110• Fieldbus Controller 750-837, /02x-000, 750-838, /02x-000 Technical Data

3.1.9 Technical Data

System data

	Number of nodes	110

	Transmission medium	shielded Cu cable3 x 0,25 mm2
	Max. length of bus line	30 m ... 1000 m
		(baud rate dependent / cable dependent)
	Baud rate	10 kBaud ... 1 MBaud
	Fieldbus connection
750-837, /020-000, /021-000:		- 5-pole male connector, series 231 (MCS)
		female connector 231-305/010-000
750-838 /020-000, /021-000:		is included
750-838 /020-000, /021-000:		- 9-pole D-SUBmale connector;
		female connector 750-963 is not included
	Programming	WAGO-I/O-PRO 32, WAGO-I/O-PRO CAA
	IEC 61131-3	IL, LD, FBD, ST, FC
	Standards and Regulations (cf. Chapter 2.2)
	EMC CE -Immunity to interference
750-837, /020-000, /021-000:		- acc. to EN 50082-2 (1996)
750-838, /020-000, /021-000:		- acc. to EN 61000-6-2 (2001)
	EMC CE -Emission of interference
750-837, /020-000, /021-000:		- acc. to EN 50081-2 (1994)
750-838, /020-000, /021-000:		- acc. to EN 61000-6-3 (2001)
	EMC marine applications
	-Immunity to interference *)	acc. to Germanischer Lloyd (01)
	EMC marine applications
	-Emission of interference *)	acc. to Germanischer Lloyd (01)
	*) only 750-837

	Approvals (cf. Chapter 2.2)
	UL *)	E175199, UL508
	DEMKO *)	02 ATEX 132273 X
		II 3 GD EEx nA II T4
	GL (Germanischer Lloyd) *)	40 197-01 HH
		Cat. A, B, C, D
	LR (Lloyd's Register) *)	02/20026
		Env. 1, 2, 3, 4
	DNV (Det Norske Veritas) *)	A-9334
		Cl. B
	RINA (Registro Italiano Navale) *)	MAC30402CS1
	ABS (American Bureau of Shipping) *)	03-HG374860-1/PDA
	Conformity identification	CE

	*) only 750-837

	Accessories
	EDS files	Download: www.wago.com
	Miniature WSB quick marking system

WAGO-I/O-SYSTEM 750

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