Dynalco SC-2124, Инструкция по установке и эксплуатации

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4.1 RESET
After power-up, the SC-2124 starts up in a RESET condition that assumes that all channels
are in a non-fault state, initializes the
ALARM and SHUTDOWN TRIP conditions to a non-
fault state, and forces all relays and discrete outputs to their non-fault states. After startup,
however, the user must manually RESET any TRIP conditions by a RESET key press from
the front panel or by setting the RESET parameter via HOST software (See Section 3.2.3).
This forces the user to actively acknowledge every SCANNER
ALARM and SHUTDOWN .
When a RESET is manually triggered, the SCANNER clears the
ALARM and SHUTDOWN
TRIP conditions and forces all relays and discrete outputs to their non-fault states. The
RESET is performed even if any scanner channels are in a fault state. If this is the case, the
SCANNER immediately TRIPs a new
ALARM or SHUTDOWN (See Sections 4.3 & 4.4).
4.2 START
After RESET, the user may trigger specific SCANNER monitoring conditions via a START
request. To trigger a START request, the user must press the START key from the front
panel or set the START parameter via HOST software (See Section 3.2.3).
When a START is triggered, the SCANNER reloads the TRIP Class B timer with its initial
timer value, expressed in minutes. Once loaded, the timer ticks down until it expires,
whereupon all TRIP Class B channels become active. If any Class B channel is in a fault
state, no
ALARM or SHUTDOWN is TRIPPED until the Class B timer is expired.