VS-MKII Control System
Chubb Fire & Security Pty Ltd
Technical Manual
Page 26 of 63
Real Time Clock
The MKII incorporates an Event Logger and Real Time Clock (RTC) which allows up to 80 faults,
alarm, shutdown, isolation and other maintenance events to be date and time stamped and stored in
system non-volatile memory for later retrieval and analysis. The RTC is kept by an onboard battery
(Fig. 34). If a fault is detected with this battery, it is reported immediately as a system fault.
Figure 34 - RTC battery
If the fault cannot be rectified or reset immediately, The RTC can be disabled in the field using switch
8 on channel L to suppress RTC related faults. Disabling the RTC shall clear all RTC related faults,
(RTC battery low, Date and Time not set, etc). If the RTC module is disabled, an entry is made to the
maintenance log and will not be removed until the RTC is re-enabled.
NOTE: PC terminal software is required to reset the Real Time Clock.
Channel
Function
Switch No.
1
2
3
4
5
6
7
8
L
Mask Primary
Power Fault
0 min (Default)
OFF
OFF
OFF
OFF
5 min
ON
OFF
OFF
OFF
15 min
OFF
ON
OFF
OFF
30 min
ON
ON
OFF
OFF
1 hr
OFF
OFF
ON
OFF
2 hr
ON
OFF
ON
OFF
3 hr
OFF
ON
ON
OFF
4 hr
ON
ON
ON
OFF
5 hr
OFF
OFF
OFF
ON
6 hr
ON
OFF
OFF
ON
7 hr
OFF
ON
OFF
ON
8 hr
ON
ON
OFF
ON
10 hr
OFF
OFF
ON
ON
12hr
ON
OFF
ON
ON
14 hr
OFF
ON
ON
ON
18 hr
ON
ON
ON
ON
The number of
Engine Shutdown
Delay Cycles
Allowed
0 (DELAY key disabled)
OFF
OFF
OFF
1 (Default)
ON
OFF
OFF
2
OFF
ON
OFF
3
ON
ON
OFF
4
OFF
OFF
ON
5
ON
OFF
ON
6
OFF
ON
ON
Unlimited
ON
ON
ON
Real Time Clock
Disable
OFF
Enable (Default)
ON
Table 12 -
Primary power fault mask, Engine shutdown cycles and Real time clock
