Data Format - Man L23/30DF Project Manual

3.3 Data Format

6
Example for Modbus ASCII Data Format:
Extract from Modbus ASCII list
MW 113 71 0 F Signal fault ZS82 : Emergency stop
(pushbutton)
1 F Signal fault ZS75 : Turning gear
disengaged
2 F Signal fault SS84 : Remote stop
3 F Signal fault SS83 : Remote start
4 F Signal fault LAH28 : Lube oil level
high
5 F Signal fault LAL28 : Lube oil level
low
6 F Signal fault LAH42 : Fuel oil leakage
high
7 F Signal fault ZS97 : Remote switch
8 F Signal fault LAH92 : OMD alarm
9 F Signal fault TAH 29-27 : CCMON
alarm
10 F Signal fault : Remote reset
11 F Signal fault LAH98 : Alternator
cooling water leakage alarm
12 F Signal fault : Emergency generator
mode
13 F Signal fault : Speed raise
14 F Signal fault : Speed lower
15 F Signal fault : Switch isochronous /
droop mode
For this example we assume that the following alarms have been triggered:
Signal fault SS83 : Remote start,
Signal fault LAL28 : Lube oil level low,
Signal fault ZS97 : Remote switch,
Signal fault LAH92 : OMD alarm,
Signal fault TAH 29-27 : CCMON alarm,
Signal fault : Emergency generator mode,
Signal fault : Switch isochronous / droop mode
The Bit-sample of MW 113:
Bit 0 1 2 3 4
Value 0 0 0 1 0
In Modbus ASCII these 16 Bits are grouped in 4 groups each containing 4
Bits and then translated from binary format to hexadecimal format (0-9, A-F)
Binary
Bit 0-3 0001
Bit 4-7 0101
Bit 8-11 1100
1001
Bit 12-15
MAN Diesel & Turbo
5 6 7 8 9 10 11
1 0 1 1 1 0 0
Hex
1
5
C
9
SF=1 CMS binary
SF=1 CMS binary
SF=1 CMS binary
SF=1 CMS binary
SF=1 CMS binary
SF=1 CMS binary
SF=1 CMS binary
SF=1 CMS binary
SF=1 CMS binary
SF=1 CMS binary
SF=1 CMS binary
SF=1 CMS binary
SF=1 CMS binary
SF=1 CMS binary
SF=1 CMS binary
SF=1 CMS binary
12 13 14 15
1 0 0 1