Goodrive20-EU series VFD Fault tracking
111
Safe code
FLASH CRC
check fault
Error occurred to STO safe
code FLASH CRC check
Contact the manufacturer.
STO alarm
1. When the hundreds of P11.16 is set to 0, the STO alarm is locked.
As shown in below fig 1, When H1 and H2 are 'OFF' during operation (safety function is
required), the drive enters safety mode and stops output. STO alarm will only be disappeared
once reset action is valid. External running command need to be reset for the drive to execute
running command again.
Running
command
Running
VFD output
Running
Stop
Running
Reset
Reset (RST)
Running
Stop
H1
H2
ON
ON
ON
ON
OFF
OFF
2. When the hundreds of P11.16 is set to 1, the STO alarm will be unlocked
As shown in below fig 2, alarm unlock means when STO appears, the STO alarm will
disappear automatically after state restoration, which requires no reset action. After reset of
external running command, the drive will execute running command again.
Running
command
Running
VFD output
Running
Stop Running
Running
Stop
H1
H2
ON
ON
ON
ON
OFF
OFF
STL1 fault
As shown in below fig 3, when the hardware circuit of safety circuit 1 is abnormal while that of
H2 signal is normal, namely, when H1 is abnormal during operation (safety function is
required), the drive enters safety mode and stops output no matter whatever the running
command is. Despite of reset commands and external running command reset, the drive will
not execute running command again, and it is STL1 alarm locked all the time.
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