Emerson Unidrive M702 User Manual

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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 1000
8 bit 2000
16 bit 3000
32 bit 4000
64 bit 5000
Parameter type Value
Volatile 0
User save 100
Power-down save 200
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.

Emerson Unidrive M702 Specifications

General

Brand	Emerson
Model	Unidrive M702
Category	Controller
Language	English