Manual revision 001
Section 4: Deploying and Operating SBE 39
plus
-IM
SBE 39
plus
-IM
35
Section 4: Deploying and Operating
SBE 39plus-IM
This section provides instructions / discussions on:
•
system operation
•
example sets of operation commands for each operating mode
•
detailed command descriptions
•
data formats
•
deployment
•
recovery
•
uploading data
•
processing data
Operation Description
The SBE 39
plus
-IM’s internal functions are supervised by two internal
mechanisms. The acquisition microcontroller supervises measurement
acquisition, and setup and sampling functions. The integrated Inductive Modem
Module (IMM) supervises communication between the 39
plus
-IM and the
remote IMM/SIM (which is typically at the surface). These separate acquisition
and communication mechanisms allow for independent control of power usage.
Acquisition consumes more power, but for shorter duration. Communication
protocols take proportionately more time, but can be controlled separately and
operate at lower power, thus maximizing battery pack life. This also prevents
communication protocols from interfering with measurement acquisition timing.
Commands can be directed to the IMM or SIM (typically at the surface),
the 39
plus
-IM’s integrated IMM (with ! prefix), or the 39
plus
-IM’s acquisition
microcontroller (with # prefix).
•
An ID command prefix (
#ii
or
!ii
) directs commands to a 39
plus
-IM with
the same ID.
•
A serial number command prefix (
#Sx:
or
!Sx:
) directs commands to a
39
plus
-IM with the same
integrated
IMM
serial number (set at the
factory; serial number is 700xxxxx or 701xxxxx, where 700 or 701
designates an IMM and xxxxx is the unique five digit serial number for
the IMM). Serial number addressing is useful if you accidentally set
identical IDs for multiple instruments, and do not realize the error until
the instruments are deployed on the mooring.
•
A Group command prefix (
#Gn:
or
!Gn:
) directs commands to all
instruments in a user-defined Group. For example, you can set up all
39
plus
-IMs to be in Group 1, all 37-IMP-ODOs to be in Group 2, etc.
Then, you can direct the appropriate commands to all instruments in the
same Group. All IM instruments are in Group 0.
•
GData
does not require a prefix and is recognized by all IM instruments
attached to the same inductive cable.
Each time a command is sent that wakes up the 39
plus
-IM’s
acquisition microcontroller:
1.
The 39
plus
-IM responds to the transmitted command, and
2.
The acquisition microcontroller goes back to sleep (quiescent state).
Notes:
•
Older SIM versions (firmware <
3.0a) do not
know
that there will
be no response from a group
command (
#Gn:
or
!Gn:
), and will
wait for a response before
allowing you to enter the next
command. Press Esc and Enter
after sending a group command to
eliminate waiting before being
able to send the next command.
•
For group addressing (
#Gn:
or
!Gn:
), the 39
plus
-IM responds
<ERROR type='FAILED'
msg='No reply from remote
device'/>
, because instruments
do not send a response to a group
command. You can confirm that
the instrument actually accepted
the command (for example, if you
changed the instrument set up,
send
#iiGetCD
to confirm the
setup change).
Note:
The 39
plus
-IM includes an
integrated
IMM in its housing. The IMM or SIM
that is connected to the controller are
referred to as
remote
to differentiate
from the integrated IMM.
