file: asimet_module_ops.html
10 May 2007

ASIMET MODULE OPERATIONS

The ASIMET main processor board (C530) operates in either RS232 or RS485 upon power up depending on where power/comms is connected and the position of a jumper. See the RS485 note at the end of this document for info on RS485 operation.

Refer to Humidity Module Command Set for a typical full command descriptions.

The latest versions of documentation for ASIMET (and other instrumentation) are available online at: http://frodo.whoi.edu/asimet/


Getting Started

The following equipment should be available:

A module should always be powered up and communicated with on the bench prior to connection to a system or when checking operation and trouble shooting. Make sure that the +12 Vdc is connected to the proper connector pin, and that the terminal is running at the proper protocol (9600, N, 8, 1). The idle current drawn should be in the 2 to 6 milliamps range depending on the module, somewhat higher for SONICWND.


Communications

The ASIMET (like IMET) 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):

PREFIX    3 char TYPE    2 digit NUM       COMMAND 
  #          XXX            nn              X(xx)

where:

Refer to the individual command set for each module for details.

REMEMBER: the latest versions of documentation for ASIMET (and other instrumentation) are available online at: http://frodo.whoi.edu/asimet/


RS232 to RS485 converters