Siemens SENTRON ATC6300 - Page 170

MODBUS communication
11.7 Reading the event log
3KC ATC6300 transfer control device
168 Manual, 03/2018, L1V30535632002A-01
Example:
Step 1: Read the stored events
Master
Function
= 4 (04H)
Address
= 5030H (5030H - 0001H = 502FH)
Number of registers
= 1 (01H)
01
04
50
2F
00
01
11
03
ATC
Function
= 4
Number of bytes
=
1 (01H)
MSB
= 100 (64H)
LSB
= 2 (02H)
01
04
02
64
42
13
C1
Step 2: Set an index for the event to be read
Master
Function
= 6 (06H)
Address
= 5030H (5030H - 0001H = 502FH)
Value
= 1 (01H)
01
06
50
2F
00
01
68
C3
ATC
Function
= 6
Address
= 5030H (5030H - 0001H = 502FH)
Value
= 1 (01H)
01
06
50
2F
00
01
68
C3