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LevelMaster 7100 User manual 2105835 Rev AA | 86
Appendix A Tank level pass-through
Tank level pass-through is the ability to establish direct communication with the LevelMaster from the PCCU32 Terminal Mode.
The LevelMaster procotol used for this communication defines commands that can be issued to obtain different types of data
(values stored in the LevelMaster memory) that can help in troubleshooting. The following sections provide a description of the
commands supported, and the procedures to activate the pass-through and issue commands. Two examples are provided to
illustrate how data requested from the LevelMaster is displayed on the terminal screen.
A.1 LevelMaster protocol commands
By using tank level pass-through (TLPT), the user can to locate problems by communicationg at a base level using the
commands found in Table 12 and
Table 13. Choose the commands corresponding to the firmware version of the electronics board in the LevelMaster. Table 12
defines the commands for version 5.015-5.018 and
Table 13 defines the commands for version 7.0.
Table 12: Commands for TLPT for board part number 2018546-005 (firmware versions 5.015 - 5.018)
Command
syntax
Description Type example
Read example
(value displayed)
Meaning of read
U**?
Return level(s), temperature,
errors, warnings,
any ID respond
U**?
U03D020.96D011.94F076E
0000W000C5ac0
03 ID, 20.96” Oil,
11.94” Water, No
Errors, CRC
Use only with 1
LevelMaster
connected.
Unn?
Return level(s), temperature,
errors, warnings
U03?
U03D020.96D011.94F076E
0000W000C5ac0
03 ID, 20.96” Oil,
11.94” Water, No
errors, CRC
U**N? Return ID U**N? U03N03Cd746 03 ID, CRC
UnnF? Return # floats U03F? U03F2C01f6 2 Floats, CRC
UnnOL? Return level offset U03OL? U03OL+0079C0732 +.79 Offset, CRC
UnnV? Return firmware version U03V? U03V5.018C09d3 5.108 firmware, CRC
UnnEDn
Return EPROM memory. 3
Blocks, enter 0,1,2, or 3
U03ED0
See section A.2.1, Example
1: Obtaining the content of
the EPROM memory
All memory blocks.
Used to check gain and
others
U???
Return level(s), temperature,
errors in test mode, any ID
U???
See section A.2.2, Example
2: Obtaining raw data values
.
Shows raw values and
other data, ie: V0, V1
to check gain.
Unn??
Return level(s), temperature,
errors, warnings until power
off
U03??
U03D020.96D011.94F076E
0000W000C5ac0
(repeated)
Aid to trouble-
shoot RS485 bus.
UnnNnn Change ID U03N00 U03N00NOKCOf11
ID change from 03 to
00, CRC
UnnFnROS Change # floats U03F1ROS U03FOKC6f57
# Floats change OK,
CRC
Table 13: Commands for TLPT for board part number 2104836-001 (firmware version 7.000)
Command
syntax
Description
U**? Measure displacement
U**?? Measure displacement in endless loop
U??? Measure displacement in old test mode