242
JOHNSON CONTROLS
5276178-JIM-C-0118
Service
MULTI MEDIA CARD
The Unit Controller is made up of two separate control
boards, the PLUG IN I/O board and the IPU board. All
the digital and analog inputs and outputs are connected
to the PLUG IN I/O control. All the system logic is
contained on the PLUG IN I/O board. The IPU board
mounts on top of the PLUG IN I/O board and handles
the communication between the PLUG IN I/O board
and the User Interface. Another feature of this control
system is the availability to connect a MULTI MEDIA
CARD to the IPU board. The MULTI MEDIA CARD
allows operational data to be continuously saved and
used for the diagnosis of unit operating problems.
A MULTI MEDIA CARD is similar to a hard drive in
a PC. It has a directory structure and files are saved on
it. The difference between a hard drive and the MULTI
MEDIA CARD is that the MULTI MEDIA CARD is
made of non-volatile flash memory. This allows the
MULTI MEDIA CARD to be removed from the IPU
board and placed in a PC for data analysis without the
lost of any data.
The MULTI MEDIA CARD is considered a Service
tool and as such is controlled through the SERVICE key
of the User Interface. Entry into the SERVICE screen
requires a Level 2 password.
Data is continuously stored to the MULTI MEDIA
CARD in root and subdirectories. The root directories
are set up by month and year, under each of the root
directories are subdirectories for each day. For example
the data for January 11, 2005 would be stored in a root
directory identified by Rm200501, the year followed
by the month. The subdirectory for this day would
be identified as 20050111.csv, the year followed by
the month, followed by the day. Each of these files
contains all the data monitored for the day specified by
the file name.
All connected Analog Inputs, Analog Outputs, Digital
Inputs, Digital Outputs, Serial Data and Derived Data
will be collected. The data will be collected once every
5 seconds and stored in the same order as in the History
buffer. Each line of data will be timed and date stamped.
Each file will include a header line detailing what data
is stored in each column.
The collected data can be analyzed using a PC. The
MULTI MEDIA CARD can be inserted into a MULTI
MEDIA CARD reader attached to the PC. The data can
be analyzed using Excel or another data analysis tool.
To install or remove the MULTI MEDIA CARD from
the IPU board
“DATA LOG FORMAT”
must be set
to OFF. This is done through the SERVICE screen
of the User Interface. When the MULTI MEDIA
CARD is installed the operation can be programmed
to
“UNCOMPRESSED”
in which case data will be
recorded every 5 seconds or
“SKIP UNCHANGED”
which is the same as
“UNCOMPRESSED”
except
values are only saved when they change.
If an error occurs when writing to the MULTI MEDIA
CARD,
“DATA LOG ERROR STATE”
and
“DATA LOG
ERROR DETAIL”
will appear under the SERVICE
screen.
“DATA LOG ERROR STATE”
indicates what
operation failed and
“DATA LOG ERROR DETAIL”
will give the error code from the operation. Table 94
gives a description of the
“DATA LOG ERROR STATE”
and Table 95 gives a description of the
“DATA LOG
ERROR DETAIL”.
DATA LOG ERROR
STATE
AN ERROR OCCURRED
WHEN DOING THIS:
1
MOUNTING THE FLASH CARD
2
OPENING THE ROOT
DIRECTORY
3
READING THE ROOT
DIRECTORY
4
CLOSING THE ROOT
DIRECTORY
5
OPENING A SUB-DIRECTORY
6
READING A SUB-DIRECTORY
7
CLOSING A SUB-DIRECTORY
8
DELETING AN OLD
DIRECTORY
11
CREATING A DIRECTORY
14
CREATING A FILE
15
OPEN A FILE
16
WRITE A FILE
17
DELETE A FILE
18
CLOSE A FILE
TABLE 104 - DATA LOG ERROR STATE
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