Compax3 device description C3I22T11
98 192-120114 N5 C3I22T11 June 2008
3.11.4. STO function test
The STO function must be checked in the event of:
Commissioning
After each exchange of any equipment within the system
After each intervention into the system wiring
In defined maintenance intervals (at least once per week) and after a longer
standstill of the machine
If the STO function was triggered by opening a protective door and if this door is
opened serveral times a week, the weekly testing interval is not required.
The check must be made by qualified personnel adhering to all necessary safety
precautions.
The following testing steps must be performed:
STO
test
Action, activity Expected reaction and effect
1 24V DC voltage on
terminal X14.1 and X14.3
2 Switch on power and 24V supply voltage No error must be present
3 Configuring the device No error must be present
4 Testing active STO on terminal X14.1 and
X14.3:
Remove 24V DC on terminal X14.1 and
X14.3 at the same time
Error message 0x5492 must be
present 1)
5 Re-apply 24V DC voltage on terminals
X14.1 and X14.3 and then acknowledge
error
No error must be present
6 Then switch off and on again 24V voltage
supply
No error must be present
1) In order to automize the test, it is sufficient here to monitor the general error
output with an external logic.
A manual check of the torqueless drive is here also sufficient.
The triggering of the STO can also be made by actuating the emergency power-off
switch. During the automated test, the STO can also be triggered via the contacts
of an external relay
Following the test steps
The performance of the individual test steps of the STO function must be logged. A
protocol specimen can be found in the following section.
Depending on the machine version, additional or other test steps may be required.
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