Table 10-4 Scenario 3: Sck-C-Modbus; Table 10-5 Scenario 4: Sck-C-Modbus - Phoenix Contact SCK-C-MODBUS User Manual

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Table 10-4 Scenario 3: SCK-C-MODBUS
Device/
error description
SCK-C-MODBUS (2901674)
There is no data or incorrect data from
one or more connected measuring
modules.
Cause
Data transmission to the affected measuring module is faulty.
Measures
1. Check the shielding and installation of the affected SCK bus data cable (see Section
2.2 on page 15 and 6.4 on page 44).
2. Remove any interference couplings.
3. After removing the error cause, test the function of the affected device.
4. If the message is still present:
a) The connection is still faulty or disrupted  see item 1.
Or b) Internal components have been damaged. In this case, replace the communi-
cation module.
5. For closer examination of the data quality, it is recommended that you record the sig-
nals on the SCK BUS cable using an oscilloscope.
Table 10-5 Scenario 4: SCK-C-MODBUS
Device/
error description
SCK-C-MODBUS (2901674)
There is no data from one or more con-
nected measuring modules.
Cause
The affected module or measuring modules connected to it were switched off by the en-
ergy-saving function.
Measures
1. If shutdown was not planned, check the source text of your program and remove the
setting for the energy-saving function (see Section 8.1 on page 67).
2. After disabling the energy-saving function, test the function of the affected module. If
it remains switched off and the register entry is set to "0", an error is present. Send in
the device.
Status register
Entry "1" in bit 6 of the
low byte
(0100 0000)
Status register
Entry "1" in bit 7 of the
low byte
(1000 0000)
Troubleshooting
LED indicator
POWER LED:
flashing (1.4 Hz)
and/or
Tx LED lights up spo-
radically
LED indicator
POWER LED:
permanently ON
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