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| INSTRUCTIONS FOR USE
OMD 202RS
DATA PROTOCOL
8.
Command 6h > Input value
<AA> 06 00 00 <Word Hi> <Word Lo> <CRC Lo> <CRC Hi>
where:
Word is the value in the format signed integer -32 768 (8000h) - 0 - 32 767 (7FFFh)
When displayed this value is recalculated with the aid of values entered in menu
VSTUPY/KONFIG/MIN/MIN. L
o
and
MAX. Lo.
Values “
MIN. Hi
” and “
MAX. Hi
” are of no significance in this case.
Response:
<AA> 06 00 00 <Word Hi><Word Lo><CRC Lo><CRC Hi>.
Command 10h > Input value
<AA> 10 00 00 00 02 04 <Lo Word Hi> <Lo Word Lo> <Hi Word Hi> <Hi Word Lo> <CRC Lo> <CRC Hi>
where:
<Hi Word><Lo Word>
together they create the value LONG INT.
Input values are calculated through the following values:
CHAN. A
= MIN. A +
x (input data - MIN.)
(MAX. - MIN.)
(MAX. A - MIN. A)
Chan. A
value to be displayed and futher processed in the instrument
MIN. A, MAX. A
values entered in menu CHANAL./CHAN. A/SETTIN.
MIN., MAX.
values entered in menu INPUTS/CONFIG
MIN. = MIN. Hi x 65536 + MIN. Lo
MAX. = MAX. Hi x 65536 + MAX. Lo
Response:
Command copied without data part <AA> 10 00 00 00 02 <CRC Lo><CRC Hi>
Command 20h > NON-STANDARD COMMAND for MODBUS
making instrument control accessible through standard commands of the OM ASCII protocol
<AA> 20
<počet znaků standardní zprávy> standardní zpráva
<CRC Lo> <CRC Hi>
Response:
provided no error occurs in MODBUS frame:
<AA> 20
<number of characters in standard message> standard message <CRC Lo> <CRC Hi>
In this format is also the response ?00, reporting error in processing standard OM command.
Address field of standard message will always be 00 - here without any significance.