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9
Maintenance
9.1
Checking for safe shutdown
The proper function of the AS-i safety monitor within the system to be secured, i.e. the
safe shutdown following the triggering of an assigned safe sensor or switch, is to be
checked at least annually by the safety officer.
Attention!
This is to be performed by activating each safe AS-i slave at least once per year and
visually inspecting the switching behaviour of the output circuits of the AS-i safety
monitor.
Attention!
The maximum switch-on time and total operating time depends on the PFD value
selected for the overall failure probability.
When the maximum switch-on time has been reached (three, six or twelve months), the
safety system must be checked to ensure that it is functioning correctly by prompting
the shutdown function.
When the total operating time has been reached (10 years), the device must be
checked at the manufacturer's factory to ensure that it is functioning correctly.
10
Status Display, Errors and Error Rectification
10.1
Status display on the device / error diagnosis on the PC
An internal or external error is indicated by the red flashing LED OFF/FAULT on the
AS-i safety monitor (see chapter 8.2 "Display and operating elements").
Notice!
A more exact diagnosis of the error is possible via the configuration interface using the
asimon software (see software user manual).
10.2
Troubleshooting tips
Error
LED AS-i 1
is off
LED AS-i 2
illuminates red
LED 3 OFF/FAULT
flashes red
LEDs 1 ... 3
simultaneously
flashing rapidly
Possible cause
No AS-i supply
Communication on the AS-i bus
is faulty
Error on level of the monitored
AS-i components
Internal device error
ASM1, ASM1E
Remedy
–
Check line connections
–
Check AS-i power supply unit
–
Check line connections
–
Check AS-i master
–
Perform diagnostics with asimon
–
If necessary, replace defective AS-i
components
–
Note down the error numbers display-
ed by asimon in the error message
window and contact the manufacturer
95
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