Inductive Modem Module (IMM) Firmware Revisions

This page lists the firmware revisions for the IMM.

Version 1.01

1. Serial Type not preserved when switching from Configuration Type 1 to Type 2.
2. Start of reply marker detection disabled for Configuration Type 1 ‘B’ commands for binary response. This legacy command was used with the UIM, the UIM does not send the start of reply code with the ‘B’ command.

Version 1.02

1. Modified timing of IM replies in Configuration Type 1 ‘bii’ binary commands. This should not cause any performance change.
2. Removed inappropriate TIMEOUT error returned after Configuration Type 1 ‘bii’ binary commands with normal inter-character delay termination.
3. TModem3 maximum value changed to 600 seconds.
4. Added TModem4 setting for Config Type 1 use.
5. Config Type 1 bii command inter-character delay timeout now activates after reception of two characters instead of one.
6. Corrected inappropriate logging of Error37 in Config Type 1.
7. Config Type 1 blocked commands now return NOT ALLOWED error.
8. Config Type 1 resets timeout timer on CR or LF, instead of just LF.

Version 1.03

1. All changes of IMFLAG conditional on enableAutoIMFlag setting.
2. Added error for invalid argument on setIMFlag=.
3. Warning added to hostfileerase command.
4. Host service 2 min timeout changed to : <TIMEOUT msg='HostService 2 min timeout'/>.
5. Event ERROR_IM_CMD_MODE removed.
6. Event ERROR_IMM_BUSY added when the IMM sends a <busy/> signal.
7. CRLF from host acts as recognized command, returning <Executed/> and resetting host timeout instead of just giving a new prompt.
8. <Executing/> tags removed from Config Type 1.
9. Corrected parsing of !00STAYON command.
10. Config Type 1 host serial decoding matched to SIM.
11. Time commands removed (hhmmss, mmddyy, ddmmyy).
12. Added !Gx:Mark commands=, sending and receiving.
13. Removed ERROR_DPSK_UART_LOCK.
14. Added executing tags to captureline reply.
15. Testcablecoupler commands and GETSD no longer cause tx power level to temporarily switch low.
16. Interface mode 7 now has enablehostserveonpwrup=0.
17. PCBtype >3 enables reset pin. pin must be held low for 1 second on startup.

Version 1.04

1. Added filter to transmit voltage measurement.
2. Corrected invalid DPSK transmit state after TESTCABLECOUPLER command.  The invalid state persisted in Host service mode only until the transmitter was disabled, a ! or # command was transmitted or the line was released. The invalid state usually resulted in inappropriate error : FAILED "Low Transmit Voltage - low battery or bad coupler".

Version 1.05

1. Added checksums and backup storage of  Configuration Data snd Hardware data to prevent loss of device configuration if power removed during EEPROM write.
2. Corrected error in SAMPLEADD and SAMPLEAPPEND commands that caused early termination of data.
3. Corrected timing error in Host Service mode when IM not transmitting,  Error resulted in longer fixed delays and longer timeout periods.
4. Removed support for 38400 baud.
5. Added *NOTIMEOUT: command for lab calibration procedures.
6. Added IMMONITOR command to log all IM traffic (including noise if no device is transmitting).
7. Added ability to upgrade firmware through RS232 port.
8. Added shortcuts for common commands:

• FCL = forcecaptureline
• TCC = test cable coupler
• T20CC = test20turncoupler
• REL = releaseline
• SWT = sendwakeuptone

ADDITIONAL INFORMATION / LINKS:

Documentation -- manual, photos, technical papers, application notes

• IMM specification sheet
• Application Notes:
  - 78: IMM Quick Start Instructions
  - 79: Configuring IMM for Logic Level Serial (LLS)
  - 80: IM Communication between Two IMMs
• Drawings:
  Logic level serial interface -- 33062
  Mechanical -- 41453
  PC serial cable with 9V power lead -- 33049
  Test coupler -- 41440
  Test coupler with 9V power lead -- 41452
• Comparison of IMM to SIM and UIM
• IM power requirements
• Real-Time Oceanography with Inductive Moorings --
  Technical paper provides background information inductive modems, principles of inductive coupling, mooring configurations, use in fresh water, system components, mooring cable and cable fitting resources, and OEM components available from Sea-Bird.
• Typical IM Mooring Components

Links to Other Instruments of Interest

• IM system:
  - Inductive Cable Coupler (ICC) -- for connection to SIM or IMM
  - Surface Inductive Modem (SIM) -- surface buoy link in inductive modem system
• Underwater IM instruments:
  - SBE 16plus-IM SEACAT C-T (pressure optional) Recorder -- accepts auxiliary sensor inputs
  - SBE 37-IMP MicroCAT C-T (pressure optional) Recorder -- has integral pump
  - SBE 37-IM MicroCAT C-T (pressure optional) Recorder
  - SBE 39-IM Temperature (pressure optional) Recorder
  - SBE 44 Underwater Inductive Modem -- integrates RS-232 instruments with inductive modem telemetry system

Last modified: 06-Apr-2007

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