Unidrive M702 User Guide
271
Issue Number: 3
Sub-array RAM
RAM allocation error
227
The Sub-array RAM indicates that an option module, derivative image or user program image has requested more
parameter RAM than is allowed. The RAM allocation is checked in order of resulting sub-trip numbers, and so the failure
with the highest sub-trip number is given. The sub-trip is calculated as (parameter size) + (parameter type) + sub-array
number.
Temp Feedback
Internal thermistor has failed
218
The
Temp Feedback
trip indicates that an internal thermistor has failed. The thermistor location can be identified by the
sub-trip number.
Recommended actions:
•
Hardware fault – Contact the supplier of the drive
Th Brake Res
Brake resistor over temperature
10
The
Th Brake Res
is initiated, If hardware based braking resistor thermal monitoring is connected and the resistor
overheats. If the braking resistor is not used then this trip must be disabled with bit 3 of Action
On Trip Detection
(10.037) to
prevent this trip.
Recommended actions:
•
Check brake resistor wiring
•
Check braking resistor value is greater than or equal to the minimum resistance value
•
Check braking resistor insulation
Th Short Circuit
Motor thermistor short circuit
25
The
Th Short Circuit
trip indicates that the motor thermistor connected to terminal 8 (analog input 3) on the control
connections or terminal 15 on the encoder terminal (15-way D-type connector) is short circuit or low impedance. The cause
of the trip can be identified by the sub-trip number.
Recommended actions:
•
Check thermistor continuity
•
Replace motor / motor thermistor
Trip
Diagnosis
Parameter size
Value
1 bit
1
000
8 bit
2
000
16 bit
3
000
32 bit
4
000
64 bit
5
000
Parameter type
Value
Volatile
0
User save
1
00
Power-down save
2
00
Sub-array
Menus
Value
Applications menus
18-20
1
Derivative image
29
2
User program image
30
3
Option slot 1 set-up
15
4
Option slot 1 applications
25
5
Option slot 2 set-up
16
6
Option slot 2 applications
26
7
Option slot 3 set-up
17
8
Option slot 3 applications
27
9
Option slot 4 set-up
24
10
Option slot 4 applications
28
11
Source
xx
y
zz
Power system
Power module number
0
Always zero
Power system
Power module number
Rectifier number
Always zero
Sub-trip
Reason
1
P1 Thermistor Short Circuit Detect
(03.123) = 1 and the resistance of the thermistor connected to the
drive P1 position feedback interface is less than 50
Ω
.
2
Analog Input 3 Mode
(07.015) = 7 and the resistance of the thermistor connected to analog input 3 is
less than 50
Ω
.
Summary of Contents for Unidrive M702
Page 283: ......
Page 284: ...0478 0002 03 ...