Honeywell 900U02-0100 - Page 206

192 ControlEdge HC900 Process & Safety Controller User and Installation Manual Revision 10
May 2019
Number
of Red
Strobes
Possible Causes
Lead and/or Reserve
Controller Action(s)
User Action
Honeywell OI
Indication
HCDesigner/HC
Utilities
Indication
5
The Real-time
Clock (RTC) is not
programmed. This
is usually a result of
the lead’s battery
failing when it was
powered-down.
1. On power-up, time and date is
initially set to 00:00:00,
January 1, 1970 on both the
lead and the reserve.
2. ASYS and FSYS blocks’ HW
OK pins are turned off.
Note: If the reserve’s battery
fails when it is powered-down.
The lead will automatically
program the reserve’s RTC
with the correct date and time
when the lead and reserve are
synchronized.
Use HCDesigner, HCUtilities, or
OI to program the real-time clock
(RTC).
If the lead’s
status LED is
indicating the
failure, see RTC
in the “Lead
CPU
Diagnostics”
display.
If the reserve’s
status LED is
indicating the
failure, see RTC
in the “Reserve
CPU
Diagnostics”
display.
If the lead’s
status LED is
indicating the
failure, see
Real-Time
Clock
Diagnostics in
the “Lead
Diagnostics
Overview”
dialog box.
If the reserve’s
status LED is
indicating the
failure, see
Real-Time
Clock
Diagnostics in
the “Reserve
Diagnostics
Overview”
dialog box.
5
One of the following
RTC conditions
occurred:
 RTC was
previously
programmed,
but when it was
last read, its date
and time were
deemed invalid.
 An attempt was
made to
program the
RTC, but it was
unsuccessful.
 The RTC is
unable to be
read. Usually
indicating a
serious
hardware failure.
Same actions as described
above.
1. Use HCDesigner, HCUtilities, or
OI to program the real-time
clock (RTC).
2. If problem persists, replace the
CPU module