Danfoss AK2-SC 255, Справочное руководство, Страница: 201 / 206

200 AK2-SC 255 Reference Manual RS.8D.M1.22
If the override point is timed and does not have interrupt enabled, the green light will
blink for up to fifteen seconds, then remain on, and the override will time out as
configured.
If the override point is not timed, a second operation of the switch will terminate the
override. The green light will blink until the SC 255 recognizes the switch, then the
override will end and the green light will go off.
Keyswitch Override
for Refrigeration High
Temperature Alarms
Configuration of the keyswitch alarm feature is covered in Chapter 4-5, Configuring
Alarms. The keyswitch allows store personnel to disable high temperature alarms
when cleaning or servicing a case or box. The alarms are re-enabled (after a delay
which allows the fixture to reach normal operating temperature) by restoring the
switch to normal position.
2.9 Using the Audit Trail
The SC 255 audit trail is a log that shows each system access together with any
changes to configuration or settings that were made during the access. The audit trail
“log” shows every system access whether from an SC 255 keypad, from a local
terminal, or from a remote location via modem.
Whenever someone gains entry to an AK2-SC 255 system, the system keeps a record
of the date and time of entry, the point of entry, and the authorization level and
account code used. Up to 4000 entries are stored, with the number reduced when
languages additional to English are selected. Each change in settings is documented.
Points of entry that can appear are keypad, local, and remote. Local means that a
user has connected a PC (such as a laptop) to one of the SC 255’s on the host
network and gained access to the system. Remote means that access has been via
modem communications.
A summary of the audit trail is shown in the authorization screen. To view details,
move the cursor to the Audit Trail box and press ENTER. The next screen shows
the record of a number of actions.