Description Of Technical Terms - YASKAWA E-V Series User Manual

 Safe Performance
Safety Integrity Level
Probability of Dangerous Failure per Hour
Category
Performance Level
Mean Time to Dangerous Failure of Each
Channel
Average Diagnostic Coverage
Stop Category
Safety Function

Description of Technical Terms

The following table shows the meanings of terms used in this manual.
Servomotor
SERVOPACK
Servo Drive
Servo System
Analog voltage and pulse train
reference model
M-II communications 
reference model
M-III communications 
reference model
Command option attachable
type
Safety Option Module
Safety Module
Panel Operator
Digital Operator
Servo ON
Servo OFF
BaseBlock (BB)
Hardwire BaseBlock Func-
tion (HWBB)
Safe Torque Off (STO)
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Items
Term
-V Series: SGMJV, SGMAV, SGMPS, SGMGV, SGMSV, and SGMCS
(Direct Drive) servomotor
Linear  Series: SGLGW, SGLFW, SGLTW, and SGLC servomotors
-V Series SGDV SERVOPACKs
A set including a servomotor and SERVOPACK (i.e., a servo amplifier)
A servo control system that includes the combination of a servo drive with a host con-
troller and peripheral devices
Analog voltage and pulse train used for SGDV SERVOPACK interface
MECHATROLINK-II communications reference used for SGDV SERVOPACK inter-
face
MECHATROLINK-III communications reference used for SGDV SERVOPACK inter-
face
SERVOPACK on which a Command Option Module can be installed
General term of option modules that provide safety functions and are mounted on
SGDV SERVOPACKs.
The option module that provides safety functions specified in this manual.
The operator with a panel display that is mounted on -V Series analog voltage and
pulse-train reference SERVOPACKs.
Handy type operator connected to -V Series SERVOPACKs
Power to motor ON
Power to motor OFF
Power supply to motor is turned OFF by shutting OFF the base current to the power
transistor that supplies power to the motor.
Safety function in the SERVOPACK
This is the safety function that is equivalent to the Safe Torque Off function defined in
IEC 61800-5-2.
This is one of safety functions defined in IEC 61800-5-2.
This is the safety function that shuts OFF power supply to the motor.
Standards
IEC 61508
IEC 62061
IEC 61508
IEC 62061
EN 954-1
EN ISO 13849-1
EN ISO 13849-1
EN ISO 13849-1
IEC 60204-1
IEC 61800-5-2
Meaning
Performance Level
SIL2
SILCL2
 -7
PFH  3.3 
10 [1/h]
(3.3% of SIL2)
Category 3
PL d (Category 2)
MTTFd: High
DCave: Medium
Stop category 0/1/2
STO/SS1/SS2/SLS