CHAPTER 9: RS232 COMMUNICATION
Page
100
of
158
PR2: 04/22/13
Benchmark 2.0LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0052_0E
GF-127
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
•
Ph: 800-526-0288
m3 = Tuning Menu
m4 = Calibration Menu
m5 = Diagnostic Menu
8. To change a value or setting for a displayed menu option, proceed as follows:
a) Enter C, followed by the number to the right of the displayed option to be changed,
and then press
<Rtn>
.
b) Enter the desired value or setting for the option and press
<Rtn>
. Refer to Chapter 3,
Tables 3-2 through 3-5 for allowable entry ranges and settings for the Operating,
Setup, Configuration and Tuning Menus. (The Calibration and Diagnostic Menus
should only be used by Factory-Trained service personnel).
c) Menu changes will be stored in non-volatile memory.
9. To redisplay the menu and view the option which was just changed in step 5, enter D and press
<Rtn>.
10. To display the Fault (F) Log, Sensor (S) Log or Time (T) Line Log, press F, S or T followed by
<Rtn>.
Refer to paragraph 9.4 for descriptions and samples of these data logs.
11. To log off and terminate the RS232 communication link, press L followed by
<Rtn>.
9.4 DATA LOGGING
During operation, the C-More Control Panel continuously monitors and logs data associated with
operational events, faults and sensor readings associated with the boiler or water heater system.
Descriptions of these data logs are provided in the following paragraphs. The basic procedure for
accessing each data log is described in paragraph 9.3, step 7.
Fault Log
9.4.1
The C-More Control Panel logs the last 20 faults (0 – 19) starting with the most recent (#0). They
can be viewed in the front panel display or via the RS232 port. The Fault Log cannot be cleared. If
the Fault Log already contains 10 faults, the earliest fault is overwritten when a new fault occurs. A
sample Fault Log display is shown in Table 9-1.
NOTE
The Operation Time (T) Log can store thousands of records.
Therefore, to view the most recently logged record, enter “T”
followed by 0 (zero) and press Enter (i.e. T0 <Enter>). To
view earlier records in reverse chronological order, enter T
and press Enter. To go back 200 or 1000 records, enter T200
or T1000, etc. and press Enter.
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
