Diagnostics And Troubleshooting Via As-Interface - Eaton RAMO5 Manual

11.4 Diagnostics and troubleshooting via AS-Interface

Diagnostics status
Thyristor/bypass contact
defective
Overload release
Thermistor tripping
No diagnostic alarm
Manual mode
(status_local_operation)
Load message 1
(status_overload_warning)
Load message 2
(status_load_indication)
1) P4 diagnostics possible only with standard slave profile (S-7.4)
All faults identified by the power module (DQL) are internally transmitted to
the AS-Interface component as group fault messages:
Di = 0 (Low). The red LED in the motor symbol lights up.
▶ Turn the key switch to the OFF position to reset the error message.
Hold the switch in this position for at least one second so that the
RAMO5 unit will detect the command.
The Reset signal via AS-i provides an additional reset option for RAMO5 units
in case the latter cannot be locally reset due to accessibility issues.
The local reset via the keyswitch remains the main application, as each
diagnosis has a cause that needs to be analyzed and eliminated on-site.
Table 47: RAMO5 internal diagnostic status (for briefed service personnel only)
Status Accumu-
lative
error
1)
P1 P2 P3 P4 DI1
0 0 1 0 0
0 1 0 0 0
0 1 1 0 0
1 1 1 0 0
1 0 0 0 1
1 0 1 0 1
1 1 0 1 1
The unit can be switched back on after approximately one minute.
If the fault continues to be present, the motor LED will show a solid red light.
If the error is corrected within this time, the red motor LED flashes. A reset
must then be performed via the key switch.
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11.4 Diagnostics and troubleshooting via AS-Interface
Peripheral Explanation
error (FID)
1 Output switched through (On position) without actuation
signal
Possible causes:
• Thyristor failed
• Bypass contact welded
• I3/I4 sensor short-circuit
• actuator short-circuit
0 Triggering at 110 % of the thermal motor simulation value
0 Possible causes:
Motor plug not plugged
• Thermistor in motor not connected
• Jumper in terminal box of motor or in motor feeder plug
missing (T1 = Pin 5, T2 = Pin 8).
• Tripping due to excessive resistance in thermistor sensor
circuit (e.g. overtemperature)
0 Possible causes:
• Overload or short-circuit of external inputs I3, I4
• Overload or short-circuit of external output
• Incorrect DIP switch setting
• Supply voltage 400 V missing
• Trip in event of undershooting current lower limit
0 Key-switch in MANUAL (HAND) position
0 Message at 90 % of thermal motor simulation value
(preventive maintenance, message reset automatically).
0 Message at 70 % of thermal motor simulation value
(preventive maintenance; message will be reset automati-
cally).
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