Table of Contents
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1.
MODBUS PROTOCOL....................................................................................................................................6
2.
MESSAGE FORMAT.......................................................................................................................................6
2.1
2.2
...............................................................................................................................................7
2.3
2.4
2.4.1
CRC 16 Flow Chart .............................................................................................................................9
2.4.2
Visual Basic Calculate CRC16 example............................................................................................10
2.5
3.
THE MODBUS FUNCTIONS........................................................................................................................10
3.1
3.2
3.3
3.4
3.5
3.6
3.7
(07) .....................................................................................................................................13
3.8
3.9
4.
ERROR MANAGEMENT..............................................................................................................................14
4.1
............................................................................................................................................15
5.
MODBUS ON ATHENA CONTROLS PLATINUM® INSTRUMENTS .................................................15
5.1
5.2
5.3
................................................................................................................................................16
5.4
....................................................................................................................................................16
5.5
...............................................................................................................................................16
5.6
6.
ELECTRICAL CONNECTIONS ..................................................................................................................17
6.1
6.2
6.3
6.3.1
References..........................................................................................................................................19
7.
C10 / M10 CONTROLLERS..........................................................................................................................19
7.1
....................................................................................................................................................19
7.2
.............................................................................................................................................20
7.3
7.4
7.5
8.
M300 CONTROLLER ....................................................................................................................................22
8.1
....................................................................................................................................................22
8.2
.............................................................................................................................................23
8.3
8.4
8.5
C
O
N
.................................................................................................................................7
...................................................................................................................................7
............................................................................................................................7
....................................................................................................................10
(01) .......................................................................................................................10
(02)...........................................................................................................................11
(03) ..................................................................................................................11
(04)......................................................................................................................11
(05)............................................................................................................................12
(06)...................................................................................................................12
(15) .....................................................................................................................13
(16) ............................................................................................................14
....................................................................................................15
.............................................................................................................................15
2
PROM .....................................................................................17
..............................................................................................................................17
..........................................................................................................20
.....................................................................................................21
.............................................................................................................22
..........................................................................................................23
.....................................................................................................24
.............................................................................................................26
T
E
N
............................................................................18
(2
) ................................................................................18
T
S
3
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