6 FUNCTIONAL SAFETY
6.4 Safety sub-function
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The operation sequence by SDINC (SDIN command) is shown below. The function monitors the address decreasing
direction.
Direction monitoring
■
Speed command exceeded
During direction monitoring, the function monitors whether the speed is within the stop speed in the monitoring direction
specified by the speed command. Upon detection that the speed command exceeds the stop speed, the STO function is
activated. However, there will be a delay equal to the time set in [Pr. PSA15 Safety sub-function - Speed detection delay time]
from when the stop speed is exceeded until the STO function is activated.
0 r/min
(mm/s)
SDI negative direction
monitor delay time
Direction monitoring
Command
Stop speed
Servo motor speed
Stop speed
An alarm will occur if the stop speed
in the address decreasing direction is
exceeded.
Feedback
ON (disabled)
SDIPC (SDIP command)
OFF (enabled)
ON (disabled)
SDIPS (SDIP output)
OFF (enabled)
ON (disabled)
SDINC (SDIN command)
OFF (enabled)
ON (disabled)
SDINS (SDIN output)
OFF (enabled)
0 r/min
(mm/s)
ON
Servo motor speed
SDIPC (SDIP command)
Stop speed
Stop speed
SDIPS (SDIP output)
ON (disabled)
OFF (enabled)
ON (disabled)
OFF (enabled)
STOS (STO output)
OFF (shut-off)
SDI positive direction
monitor delay time
Feedback
Command
Direction monitoring
STO state
Speed detection delay time