file: logr53_cf_ops.html
26 Apr 2007


The LOGR53 main CPU board (VMLOGR53) normally operates in RS232 mode.
See the LOGR53 Functional Description for info on changing to RS485 operation as well as the RS485 note at the end of this document.

Refer to LOGR53 NTAS w/CompactFLASH & Iridium Support for typical full command descriptions.

Getting Started

Individual ASIMET modules may be connected and disconnected while the LOGR53 logger is running. Each minute, as modules are polled, missing modules are flagged, and the STAT command will report comms failures during all but the final 15 seconds of the logging interval (see RI setting, typically 60 seconds). For example, if there is no response from the PRC module when the LOGR53 logger polls, the STAT command will report "PRC failure" in its output message for the next 45 seconds; power to the module is also turned OFF during this time, and 15 seconds before the end of the interval, it is restored. Hopefully the module recovers for this next cycle; note that modules DO NOT produce "good" data values until they rollover their internal 60-second sampling intervals; thus, for example, a WND module will respond the first minute after it is connected to the LOGR53 logger (so there will be no failure message for the next minute) but will not have good data until the next minute. This is normal; ALL ASIMET modules operate asynchronously on their individual internal real-time clocks.


The LOGR53 (like ASIMET) has a communications protocol based on the SAIL (Serial ASCII Interface Loop) protocol developed at Oregon State University. The module is interrogated by sending commands with the following format (always with capital letters and terminated with a RETURN <cr>):


The STAT or STATD command will display several lines of status info about the instrument. Note that unlike the ASIMET and VMCM2 series instruments, the LOGR53 software does not use SAIL Addresses currently, just the preceding # character, and always a terminating RETURN (ASCII carriage return <cr>)

On power up, the LOGR53 logger will always come up running and logging as last configured (the STAT or STATD command will indicate Sampling GO when the LOGR53 logger is running).

NOTE that only a subset of the commands is available while the LOGR53 logger is running. The H command will indicate which commands are available depending upon the GO / STOPPED state of the LOGR53 logger.

Refer to LOGR53-CF Commands document for full command descriptions.

Deployment Quick Start

For the complete discussion of LOGR53 system preparation for deployment, refer to the LOGR53-CF System Prep document.

The important steps are:

RS232 to RS485 converters