ASDA A2-E
Chapter 7 Safety Function (Safe Torque Off, STO)
7-6
Revision April, 2015
2. After the FDBK status restores, alarms can be cleared by normal corrective actions.
In this case, AL500 can be cleared by DI: Alm Reset.
Example of No Latch:
If Logic C P2-93 = XX12 is set, the FDBK status will be close when the safety signal is
lost and AL005 occurs.
1. Since FDBK is selected as No Latch, safety signals return to normal and the
FDBK status automatically changes from short-circuited to normal when AL500
occurs. Do not need to set P2-93 to XX12 again.
2. After the FDBK status restores, alarms can be cleared by normal corrective
actions. In this case, AL500 can be solved by DI: Alm Reset.
P2-93
STO
STO FDBK Control
Address
：
02BAH
02BCH
Interface
：
Panel / Software
Communication
Reference
：
-
Default
：
0
Control Mode
：
ALL
Unit
：
-
Range
：
-
Format
：
DEC
Data Size
：
16-bit
Settings
：
BIT0: Select the logic for FDBK status
BIT1: Determine if FDBK should be Latched
7.4 Related Alarm Descriptions of STO Function
Display
Alarm Name
Alarm Description
Corrective
Actions
Corresponding
DO
Servo
Status
AL500
STO function is
enabled
Safety function (STO) is
manually enabled.
Please check the
causes.
DI.ARST or
write 0 into
P0-01 or
0x6040.Fault
Reset
ALM
Servo
Off
AL501
STO_A lost
(signal lost or
error)
Make sure the wiring of
STO_A is correct
DI.ARST or
write 0 into
P0-01 or
0x6040.Fault
Reset
ALM
Servo
Off
AL502
STO_B lost
(signal lost or
error)
Make sure the wiring of
STO_B is correct
DI.ARST or
write 0 into
P0-01 or
0x6040.Fault
Reset
ALM
Servo
Off
AL503 STO_error
Internal circuit of STO_A
~ / STO_A and STO_B ~
/ STO_B is diagnosed as
error
DI.ARST or
write 0 into
P0-01 or
0x6040.Fault
Reset
ALM
Servo
Off
Causes and Corrective Actions:
