AERCO BMK 1.5 LN July 2011 - Manual (Page 99)

CHAPTER 9: RS232 COMMUNICATION
PR2: 05/09/12 Page 99 of 152
Benchmark 1.5LN Low NOx Boiler
Operation and Maintenance Manual
OMM-0041_0D
GF-120
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
Operation Time Log 9.4.2
The Operation Time Log consists of a string of ASCII records stored in non-volatile memory within
the C-More Control Panel. Events such as power-up, ignition and turn-off are time stamped. Data
logged while the unit is running are run-length encoded. Data is logged or the run-length
incremented every 30 seconds. For a new run record to be logged, the fire rate or flame strength
must change by more than 5%, or the run mode must change. At steady-state, the run-length is
allowed to reach a maximum of 30 minutes before the record is logged. This means that no more
than 30 minutes of data can be lost if the unit loses power. Table 9-2 shows a sample Operation
Time Log for a boiler:
The Operation Time Log can only be accessed through the RS232 interface using a laptop or other
terminal device. Ten operation time records are displayed for each T command entry. The operation
time log can be cleared ONLY by factory authorized personnel using the Clear Log option in the
Factory menu.
NOTE:
The Sensor (S) Log can store up to 1200 records. Therefore,
to view the most recently logged record, enter “S” followed by
0 (zero) and then press Enter (i.e. S0 ). To view
earlier records in reverse chronological order, enter S and
press Enter. To go back 200 or 700 records, enter S200 or
S700, etc. and press Enter.
Sensor Log 9.4.3
The sensor values can be logged at a different rate if needed by setting the Sensor Log Interval in
the Diagnostics Menu. The log interval can vary from once every minute to once every day. Table 9-
3 shows a sample Sensor Log every 5 minutes for a boiler running in Constant Setpoint mode.
Table 9-1. Sample Fault Log Display
No. Fault Message Cycle Date Time
0 Direct Drive Signal Fault 609 1/10/02 8:42am
1 Low Gas Pressure 366 7/04/01 5:29pm
2 Loss of Power 0 1/01/01 11:50am
Table 9-2. Sample Operation Time Log Display
Status Fire Rate Flame Run Length Date Time
Off, Direct Drive 0 0 8 1/15/02 2:35pm
Run, Direct Drive 38 100 34 1/15/02 2:27pm
Run, Direct Drive 31 100 30 1/15/02 1:53am
Run, Direct Drive 35 100 2 1/15/02 1:23pm
Run, Direct Drive 29 100 0 1/15/02 1:21pm
Ignition 0 0 0 1/15/02 1:20pm
Off, Switch 0 0 35 1/15/02 12:30pm
Run, Manual 40 100 0 1/15/02 11:55am
Ignition 0 0 0 1/15/02 11:55am
Power-up 0 0 0 1/15/02 11:50am