ABB DCS880 - Repetitive Function Test (Fault Shutdown Path); Fault Shutdown Path; Test Procedure

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Safe Torque Off (STO)
3ADW000488R0101 DCS880 Service manual e a
Repetitive function test (fault shutdown path)
Fault shutdown path
Due to the special nature of STO in DC drives a load switching device, e.g. a mains contactor (MC), an air
circuit breaker (ACB), a DC breaker (DCB) or a high speed DC breaker (HSDCB) must be installed in the power
circuit of the system and be opened by relay XSMC:STO on the SDCS-CON-H01 in case of a drive hardware
fault.
Test procedure
For this test Drive composer pro is needed.
Step
Action
Comment
1
Set 31.22 STO indication run/stop = No
indication/No indication.
2
Write down the values of:
− 31.94 STO time 1 =
− 31.95 STO time 2 =
3
Create a custom workspace:
− 31.22 STO indication run/stop.
− 31.94 STO time 1.
− 31.95 STO time 2.
− 31.98 STO actual status.
− 31.100 STO Test mode.
− 06.24 Current Controller status word 1.
4
Create monitor with 31.98 STO actual
status and select following bits:
− XSTO1.
− XSTO1 Diag.
− XSTO2.
− XSTO2 Diag.
− XSMCSTO.
Mask = 20F.
Set the Max in the monitor to 0x220.
5
Set the drive to local.
6
If open, close the STO terminal circuit.
7
Give a run (press Start) command and a
suitable reference to the drive.
Note:
It is important that there is a current flow
during this test. Any current flow is
sufficient.