INVT Goodrive20-EU VFD Series Operation Manual page 115

Goodrive20-EU series VFD
Fault
Fault type
code
Safe code
CrCE FLASH CRC
check fault
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.
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.
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.
Possible cause
Error occurred to STO safe
code FLASH CRC check
Running
command
Running
H1
ON
OFF
ON OFF
H2
VFD output
Running
Reset (RST)
Running
command
Running
H1
ON
OFF
ON OFF
H2
Running
VFD output
Stop
Contact the manufacturer.
Stop
Running
ON
ON
Stop
Running
Reset
Stop
Running
ON
ON
Running
111
Fault tracking
Solutions