Test Function; Acknowledge Function - ABB Orion1 Base Original Instructions Manual

7.2 Test function

The Test function is activated by pressing a normally open external contact (TEST push-button) for at least 0.5 s.
The test signal is active high.
Figure 27 – Time chart of the Test function

7.3 Acknowledge function

The Acknowledge function is used in presence of an internal error like an optical error, an OSSD error or an EDM
error or a selection of Manual/Automatic Reset error (see paragraph 8 – "Diagnostic functions").
The Acknowledge function is activated by pressing an external NO contact (ACKNOWLEDGE/RESET push-button)
for at least 5 s. The AOPD then returns to normal operation mode. The Acknowledge signal is active high.
Figure 28 – Time chart of the Acknowledge function
2TLC172287M0201 Rev B
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2015-09-17