Chapter 17 Safe Torque Off Function
MS300
(High Speed Model)
17-2
17-1 Basic Function Description
MS300 series provides a Safe Torque Off (STO, Safe Torque Off) function. Through the
dual-channel S1 and S2 signal input to turn off IGBT switching, thereby preventing the
generation of motor torque in order to achieve safe stop. Please refer to Figure 1 for the circuit
diagram of Safe Torque Off function.
MS300 Safe Torque Off function meets the following international specifications:
ISO 13849-1: 2015 Category 3 PL d
IEC 61508 SIL2
EN 62061 SIL CL 2
EN 60204-1 Category 0
Line
Driver
GU
GV
GW
GX
GY
GZ
Gate
Driver
IGBT Power Section
Motor
STO Functional Block Of Subsystem 3
+3.3V
+3.3V
+3.3V
A
B
C
D
G
F
FDBK
MO2
MCM
RC
RA
1
2
3
S1
DCM
S2
DCM
R1
R2
R3
MCU
AC power
Line
Driver
2
SU1
SV1
SW1
SX
SY
SZ
SU
SV
SW
R4
4
+3.3V
D
E
C
Reset
IC
+3.3V
Channel A (safety)
Channel B (safety)
Diagnostic path
Non-safety path
Safety PLC
Emergency
Stop button
+24VDC
Figure 1: The circuit diagram of Safe Torque Off function
Summary of Contents for VFD11AMS21AFSHA
Page 5: ...IV This page intentionally left blank...
Page 8: ...Chapter 1 Introduction MS300 High Speed Model 1 3 1 2 Model Name 1 3 Serial Number...
Page 20: ...Chapter 3 Installation MS300 High Speed Model 3 3...
Page 21: ...Chapter 3 Installation MS300 High Speed Model 3 4 This page intentionally left blank...
Page 24: ...Chapter 4 Wiring MS300 High Speed Model 4 3 4 1 Wiring...
Page 25: ...Chapter 4 Wiring MS300 High Speed Model 4 4 Figure 1...
Page 27: ...Chapter 4 Wiring MS300 High Speed Model 4 6 4 2 System Wiring Diagram...
Page 43: ...Chapter 6 Control Terminals MS300 High Speed Model 6 6 This page intentionally left blank...
Page 91: ...Chapter 8 Optional Cards MS300 High Speed Model 8 8 Frame F Fig 8 16...
Page 115: ...Chapter 9 Specification MS300 High Speed Model 9 10 This page intentionally left blank...
Page 123: ...Chapter 10 Digital Keypad MS300 High Speed Model 10 8 This page intentionally left blank...
Page 293: ...Chapter 13 Warning Codes MS300 High Speed Model 13 6 This page intentionally left blank...
Page 303: ...Chapter 14 Error Codes MS300 High Speed Model 14 10 This page intentionally left blank...