Atlas Copco PowerMACS 4000, User Manual

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System Architecture
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2.3.1.2 TC Description
All indicators are located on the front of the TC.
LEDs
HMI
Soft buttons
HMI Display
The following LED indicators can be found on top of the TC and are common with the LEDs found on
PTCs.

OK is lit green when last cycle (tightening) performed by the TC was OK.

NOK is lit red when last cycle (tightening) performed by the TC was NOK.

ALARM is lit red when a servo or spindle hardware or system error has been detected on the TC.
To acknowledge the alarm the PLC variable RESET can be used, an attempt to acknowledge the
alarm is also performed automaticly at each cycle start.