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Device Description
WAGO-I/O-SYSTEM 750
753-668/000-004 4FAI 0/4-20 mA Diff PROFIsafe
Manual
Version 1.0.0, valid from HW/SW Version 01/01
Figure 6: Indicators, Communication / I/O Module Status
Table 9
: Legend for Figure “Indicators, Communication / I/O Module Status”
Designation
LED
Status
Function
Group error
E
Off
No error
Red
Module, channel pair or channel error (see
Section “Diagnostics” > “Behavior in Case
of Error”)
Red 2 Hz
flashing
Internal safety critical error, see Note
“Behavior when group error LED is flashing”
Local bus
communication
F
Green
Local bus communication, active
Red
Local bus communication, error
PROFIsafe
status
G
Off
PROFIsafe data exchange, inactive
Green
PROFIsafe data exchange, active
Green
0.5 Hz
flashing
Acknowledgment by operator required
(Operator Acknowledge, OA) (see Section
“Diagnostics” > “Acknowledging Error
Messages”)
Red
No valid F-parameters available
Red 1 Hz
flashing
PROFIsafe communication error (CRC2
error): Watchdog time (F_WD_Time)
exceeded
Parameterization
H
Off
Parameterization OK
Red
F I/O module selected via WAGO-I/O-
CHECK
Red 1 Hz
flashing
iParameters invalid or F_iPar_CRC set to
values not equivalent to iPar_CRC
Red 2 Hz
flashing
iParameters were transferred to the F I/O
module, but not yet saved.
Green 2 Hz
flashing
F I/O module is in PROFIsafe test mode.
The group error LED (LED
E
) can illuminate alone or in conjunction with other
LEDs. Detailed information about the occurred group error is available in the
section "Diagnostics".