Contrec 515 BR03, Operation Manual

Page: 82 / 110

Communications
72 515 BR03 - 15 August 2021
Refer to Communications on page 59 for setting the instrument address.
Note: The instrument always responds with its address in the header
regardless of the type of request.
Log Type and Number
The log type and number enables a communicating device to retrieve data
from the instrument. The data can be from the event-based logs or from the
current process variables with the either accumulated or non-accumulated
(resettable) totals.
The log request is optional. If the log request is not included, or the log
number is set to 000, the instrument returns the current process variables. If
the log request is included, the log number defines the specific log entry by
counting backwards. The most recent log entry for a timebase is 001.
The “last edit” log records the process variables at the time of the last exit
from the calibration edit mode. There is only one “last edit” log, therefore,
if a number is included in the request, the instrument ignores the number and
returns the data at the time of the last edit. Likewise, there is only one set of
current process variables with “non-accumulated totals”, therefore it also
ignores any log number included in that request.
The types of the logs applicable to this instrument are as follows:
The number of the log entry is the same as shown on the front panel of the
instrument. For example, a request for LR003 would return the data for the
log entry two batches prior to the most recent batch log entry.
Instrument Responses
The instrument response time to any enquiry is not more than 300 ms. The
responses from the instrument are in the following format:
HEADER
L
F
C
R
DATA
L
F
C
R
DATA
L
F
C
R
.
.
.
DATA
L
F
C
R
L
F
C
R
Log Type
LE - last edit log
LR - logged records (non-timebased logging)
LN - current totals displayed as Non-accumulated