Plc; Plc Hardware Alarm - ABB ETL600 Instruction Manual

ABB Switzerland Ltd
9.6.1.

PLC

9.6.1.1.

PLC hardware alarm

HMI600 Alarm Text
• Frontend DSP
stopped working
• Upconverter DSP
stopped working
• NSD600 DSP
stopped working
• NSK600 DSP
stopped working
• MOD600 DSP
stopped working
• Master DSP
program memory
CRC error
• Frontend DSP
program memory
CRC error
• Upconverter DSP
program memory
CRC error
• NSD600 DSP
program memory
CRC error
• NSK600 DSP
program memory
CRC error
• +12 V undervoltage
• -12 V undervoltage
• +5 V undervoltage
9-16
1KHW001489-EN
Explanation and corrective actions
(the latter in italics)
The Frontend DSP / Upconverter DSP / NSD600 DSP /
NSK600 DSP / MOD600 DSP on P4LT stopped working
for more than 1 s longer than the configured pickup time
for hardware alarms, followed by an automatic reset of the
system. The reason can be faulty P4LT hardware or
excessive EMI, possibly in combination with poor
substation grounding and/or not properly grounded cable
shields.
Connect the shields of cables to ETL600 to ground as
described in section 6. Improve the grounding of ETL600,
specially the connections between the buried earth grid
and substation ground, substation ground and cabinet,
cabinet and (swing) frame, (swing) frame and equipment
rack.
If external EMI effects can be excluded and the error
message appears repeatedly, replace P4LT.
A memory error has been detected in the memory of the
Master DSP / Frontend DSP / Upconverter DSP / NSD600
DSP / NSK600 DSP on P4LT. The reason can be faulty
P4LT hardware or excessive EMI, possibly in combination
with poor substation grounding and/or not properly
grounded cable shields.
Connect the shields of cables to ETL600 to ground as
described in section 6. Improve the grounding of ETL600,
specially the connections between the buried earth grid
and substation ground, substation ground and cabinet,
cabinet and (swing) frame, (swing) frame and equipment
rack.
If external EMI effects can be excluded and the error
message appears repeatedly, replace P4LT.
Undervoltage detected on the +12 V / –12 V / +5 V rails
supplied by the DC-DC converter B4LE.
Check for overload on the +12 V / –12 V / +5 V supplies by
removing the module R1BC (mounted on the backplane of
P7LC) and the modules in the subrack P7LC sequentially
until only the DC-DC converter B4LE and P4LT are left in
the subrack. Unplug all cables to P4LT. Replace B4LE. If
the error persists, replace P4LT.
November 2005
ETL600
Troubleshooting