YASKAWA CPCR-MR08C Bulletin page 31

3 3 4 External Base offCircuit
When the external base off circuit operates,
the proportional drive command circuit in Par.
When one Servopack is used to control several
3.3.2 operates at the same time. To prevent an
motors, the motors and TG must be switched with
abnormal operation due to,saturation of the speed
the drive circuit off. To keep the motor in stand-
amplifier when releasing the base off, it is un-
still, the drive circuit must be off. In this case,
by shortcircuiting across terminals (_ and _), necessary to use the proportional drive command
the drive circuits for the forward and reverse circuit. As reference, Fig 3.16 shows the external
sides can be stopped at the same time [Fig. 3.15 base off methods when overtravel preventive
(a) and (b)_. circuits a re used.
EXTERNAL SIGNAL ', _ ; II
BASE O FF3TO 3TO
! o1-1 4mA ....+=v =R=
L L-(SGOV)7
1RR: Low-level ralay type G2A- External Base off ON : V < 1.5V
432A made by OMRON Corpo- External Base off OFF: V > 6.0 V Fig. 3.16 External Base off Method when using
rationor equivalent. Overtravel Preventive Circuit
(a) External Base off Circuit (b) External Base off Circuit
using Low-level-Relay using Non-contact Signal
Fig. 3.15 External Base off Circuit
3.3.5 Protective Circuit
Servopack CPCR-MR[:]C provides various functions (i) Trouble Detecting Function
to protect the body and motor from malfunctions.
The troub]e detecting functions are shown in
Table 3.2.
Table 3.2 Trouble Detecting Function
CPCR- MR 01 C to - MR07 C CPCR-MR08C to -MR99C
SERVOPACK Type
SERVOPACK SERVOPACK SERVOPACK Standard Type CPCR-
Trouble _ only andType andType
Protecting Function _ JESP-PT JUSP-RG Type M Ri-_]CL
TG Trouble Detection: Detects, broken, or short-
- © -- ©
ed wiring or reverse connection in TG circuit.
Overcurrent Detection*: Detects an overcurrent
in transistor due to malfunctioning such as motor O © O ©
insulation problems.
Overvoltage Detection: Detects abnormal DC O © _) ©
voltage in the main circuit due to large load inertia.
Blown Fuse Detection: Detects that the []
SERVOPACK main fuse is blown. (Output: Contact output across terminals _-_)) ©
Motor Accomplished by a separately installed thermal overload relay.
Overload Detection: Overload
Detects overload of motor or
SERVOPACK SERVOPACK © (For type
Overload _ -- JESP_PT ) - _ ©
Heat Sink Overheat DetectionS: Detects exces- © ©
sively overheated heat sink by cooling fan (For type CPCR - MR 07 C) (FortypesCPCR-MR55C to-MR99C)
malfunction etc.
Regenerative Circuit Trouble Detection: Detects
breakdown of regenerative resistance, or trouble -- © ©
in regenerative transistor or regenerative circuit.
Indication See the next Par. (2). Take corrective action when protective circuit operates.
Item0 Item _) I
Protective Circuit ON Output_ -- contact output Lead relay I Item ©
1NONCcontact contact output contact output
Reset Power off Reset BS Power off Reset BS
*Overcurrent meansan instantaneous(100,usor less)current (greater _0: External signals are not output.
than 1.2 to 2.0 times the instantaneous maximum current of Servo- 8,(_,[7: External signals are output.
pock)passingthrough the power transistor used in the main circuit. Output contact specification
_): Power relay 1NONC contact; 200 VAC 1A, 24 VDC 1A
_" S pecification for the special type. _): Lead relay 1NO contact; 100 VAC 0.3A (15 VA max)
[]: 1NO contact; 200VAC 1A, 24VDC 1A
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