Diagnostics And Error Removal; Table 10-2 Scenario 1: Sck-C-Modbus; Table 10-3 Scenario 2: Sck-C-Modbus - Phoenix Contact SCK-C-MODBUS User Manual

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10.1

Diagnostics and error removal

Table 10-2 Scenario 1: SCK-C-MODBUS
Device/
error description
SCK-C-MODBUS (2901674)
There is no data from one or more
connected measuring modules.
Cause
Short circuit on the SCK bus connection.
Measures
1. Locate the short circuit: disconnect all measuring modules from the communication
module one at a time until the affected cable is found.
2. Check the affected cable and remove the short circuit.
3. After removing the error cause, test the function of the modules. The short-circuit
message should no longer be present in the status register.
4. If the message is still present:
a) The short circuit has not been removed completely  see item 1.
Or b) Internal components have been damaged by the short circuit (high currents
possible). In this case, replace the communication module.
Table 10-3 Scenario 2: SCK-C-MODBUS
Device/
error description
SCK-C-MODBUS (2901674)
There is no data from one or more con-
nected measuring modules.
Cause
There is no connection to the measuring module at the affected input.
Measures
1. Check the affected cable.
2. Check whether the SCK BUS plug of the affected measuring module is connected
correctly.
3. Correct the connection, if necessary.
4. After removing the error cause, test the function of the affected modules.
5. If the message is still present:
a) The connection is still faulty  see item 1.
Or b) Internal components have been damaged. In this case, replace the communi-
cation module.
Status register
Entry "1" in bit 4 of the low
byte
(0001 0000)
Status register
Entry "1" in bit 5 of the
low byte
(0010 0000)
LED indicator
POWER LED:
flashing (1.4 Hz)
LED indicator
POWER LED:
permanently ON
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