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Diagnostics
7.1
Status and Diagnostic LEDs
2 diagnostic LEDs (red) and 13 status LEDs (green) on the front panel of the
module provide information about the state of the IM 178-4.
The SF diagnostic LED (red, group error) basically indicates the status of the
hardware.
The BF diagnostic LED (red, bus error) provides information about the
connection to PROFIBUS DP.
The ON status LED (green) indicates that the module is ready for operation.
The status LEDs 0I0, 0I1, 0I2, 0Q0, 0Q1, 0Q2, 1I0, 1I1, 1I2, 1Q0, 1Q1, 1Q2
indicate the state of the digital inputs and outputs.
IM 178-4
Table 7-1
ON Status LED and Diagnostic LEDs on the IM 178-4
SF
SF: red
BF
BF: red
ON: green
ON
LEDs
ON
BF
SF
Hardware defect on the IM 178-4.
*
*
The voltage is applied to the IM 178-4,
the module has detected no hardware
error.
*
The IM 178-4 has incorrect parameters
– there is no data exchange between
the DP master and IM 178-4.
Causes:
Check the PROFIBUS address.
IM 178-4
C79000-G7076-C178-01
Meaning
g
The module is defective and must be
replaced.
–
Remedy
y
Check the IM 178-4.
Check the configuration and
parameter assignment.
7
7-1
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