YASKAWA CPCR-MR08C Bulletin page 44

3.8.1 Protection Device Type JESP-PT[]] (Cont'd) 3.8.2 Regenerative Unit Type JUSP-RG
(b) Wiring Regenerative unittype JUSP-RG[]] for Servopack
types CPCR-MR01C to -MR07C is available as an
• Do not pull, tug or jerk the connector leads, option. Servopack type CPCR-MR[]]C utilizes
• When fitting the connector, insure proper regenerative braking system to stop the motor,
direction of insertion and avoid bending so that the main circuit voltage increases by
pins. Do not insert forcibly, regenerative power when applying dynamic brake•
• When wiring, do not obscure the reset push- When a load with large inertia is driven or when
button and the indicating LEDs. motor is driven with minus load and regenerative
energy is continuously generated, main circuit
(c) Procedures when the protectior device has parts may be damaged due to overvoltage. Type
been actuated JUSP-RG[]] caps the increase of voltage at a
The protection device contains two indicators; constant value and prevents Servopack main
a white LED which turns red to indicate an in- circuit parts from damage•
put/output signal and a red LED which lights to Type JUSP-RG[]] contains protective circuits
indicate the protecting-circuit operation mode. to detect overvoltage and regenerative circuit
If the protecting circuit ("overcurrent protec- trouble caused by defective regeneration, and
tion," "overvoltage protection" and "TG trouble outputs operation status as alarm signals (lead
protection") is actuated, a servo trouble signal is relay contact). Therefore if any trouble occurs,
sent to Servopack, to stop the action of the motor or when an increase of regenerative processing
drive circuit• performance is required, depending on load condi-
tions, or prompt corrective action can be taken.
The protecting circuit continues to function
unless the protection device is reset. For resetting
the protecting circuit, locate the cause of trouble, (i) Specifications
and take a proper action. Table 3.9 shows the specifications of regenerative
For resetting, depress the IBS pushbutton unit type JUSP-RG.
on the surface of the protection device (the alarm
circuit of Servopack is reset simultaneously).
While the pushbutton is kept depressed, the LEDs
LPROTECT ],[T_ and IRE-GENE] and IALARMI on
the circuit board of Servopack light•
Table 3.9 Specifications of Regenerative Unit
RegenerativeUnit Type JUSP- RG001 RG002 RG003
MR 05 C, MR07C
SERVOPACK Type CPCR- MR01 CJ, MR02 CJ MR 02 C MR 01 C
Regenerative Voltage 170VDC 85VDC 65VDC
Regenerative C urrent 8 ADC 8ADC 6 ADC
Overvoltage 192 V -t- 5 V 96 V _+3 V 73 V _+2 V
Detection* The protective circuit o _erates instantaneously at the above voltage.
Protective Regenerative The protective circuit operates when regenerative circuit is in failure status
Functions Trouble Detectiont for approx 0.5 s.
Protective Circuit
Lead relay (Type SRF-14 B made by Nippon Electric); 1 NO contact
Operation Output
Relay (Alarm Relay)_ Contact capacity--100 V, 0.3A max (15VA max)
20_ or more 10_ or more 10P, or more
External Additional Resistor
(100 W or more) (100 W or more) (100 W or more)
*This works when main circuit voltage increases more than the _' Overvoltage deteqtion signals and regeneration trouble detection
value in the table due to regenerative circuit trouble or regen- signals are output from the same relay.
erative processing shortage. # This external resistor will be connected to terminals (_ and
_'Abnormal (failure) status of the regenerative circuit means; (_) in the unit to increase regenerative current in the case of
abnormal short circuit in the power transistor for regeneration; regenerative processing shortage.
disconnection of the wire-wound resistor for regeneration.
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