Table of contents
1
Warnings and notes ............................................................................................................... 5
1.1
Standards / directives ....................................................................................................... 5
1.2
1.3
Maintenance ...................................................................................................................... 5
1.4
Warnings and notes .......................................................................................................... 5
2
Preface ................................................................................................................................... 6
2.1
2.2
Repeater feature ............................................................................................................... 6
2.3
2.4
3
Electrical connection .............................................................................................................. 8
3.1
3.2
3.3
Shield connection .............................................................................................................. 9
3.4
Bus termination ................................................................................................................. 9
3.5
3.6
Bus cable .......................................................................................................................... 10
4
4.1
4.2
Connectors ....................................................................................................................... 12
4.3
Diagnosis LED's .............................................................................................................. 12
4.3.1
LED RES ................................................................................................................... 12
4.3.2
LED DBG .................................................................................................................. 12
4.3.3
LED CAN ................................................................................................................... 12
4.3.4
LED CH1 ................................................................................................................... 13
4.3.5
LED BA1+BA2.......................................................................................................... 13
4.3.6
LED DX1+DX2 ......................................................................................................... 13
4.4
5
5.1
5.1.1
5.1.2
6
MODBUS ............................................................................................................................. 19
6.1
MODBUS protocol layer................................................................................................. 19
6.1.1
6.1.2
6.1.3
6.2
Cyclic data ........................................................................................................................ 22
6.2.1
Input register............................................................................................................. 22
6.2.2
Output register ......................................................................................................... 24
6.3
Special function codes ................................................................................................... 26
6.3.1
6.3.2
7
System functions .................................................................................................................. 27
DREHMO - i-matic Modbus loop redundant board
Complementary operating manual
page 3 of 32
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