Chapter 17 Safe Torque Off Function
MS300
(High Speed Model)
17-3
17-2 Safe
Torque Off Terminal Function Description
As mentioned earlier STO (Safe torque off) related terminal functions are described in Table 1 below.
Terminals
Terminal Function
Specifications
+24V
When the STO function is
not used, the STO function
can be disabled by shorting
S1 and S2 with + 24V
Output voltage range: +24V
±
10 %
Output voltage capacity: 100 mA
S1
Signal input of STO function
channel 1
S1
~
DCM / S2
~
DCM
Rated input voltage: +24 VDC
±
10 %; Max. input voltage: +30
VDC
±
10 %
Rated input current: 6.67 mA
±
10 %
STO activation mode
Input voltage level: 0 VDC < S1~DCM and S2~DCM < 5 VDC
STO response time:
≤
20 ms (time required for S1/S2 operate
till the drive stop outputting)
STO cut-off mode
Input voltage level:
11 VDC < S1~DCM and S2~DCM < 30 VDC
S2
Signal input of STO function
channel 2
DCM
Reference ground of S1
and S2 signal
Table 1: Terminal function description
Action logic and keypad display after S1/S2 signal input are described in Table 2 below.
Signal
Status
S1~DCM ON
ON
OFF OFF
S2~DCM
ON OFF ON OFF
Drive output
Ready to output
STL2 mode
(Torque output off)
STL1 mode
(Torque output off)
STO mode
(Torque output off)
Error displayed on
keypad
No error displayed
STL2
STL1
STO
Table 2: Description of action logic and keypad display
STO means channel 1 and 2 operate simultaneously and enter Safe Torque Off.
STL1 means channel 1 operates.
STL2 means channel 2 operates.
STL3 means there is error detected in the internal circuit of channel 1 or channel 2.
S1
~
DCM / S2
~
DCM ON: means S1~ DCM / S2
~
DCM inputs a power supply > 11 VDC.
S1~ DCM / S2
~
DCM OFF: means S1~ DCM / S2
~
DCM inputs a power supply < 5 VDC.
Содержание VFD11AMS21AFSHA
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