Siemens CP 243-1 IT, Техническое руководство

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Configuration 03/03
CP 243-1 IT
J31069-D0429-U001-A0-7618
70
4.4.2 Structure of Configuration Data Block (CDB)
The CDB is created by the Internet wizard in STEP 7 Micro/WIN 32. The structure
of the CDB is shown below in the following table.
Byte Offset
in Variable
Memory
Description Data Format Example
Header
0-4 Module name 5 bytes, ASCII 16#4350323433
“CP243”
5-6 Length of the CDB 2 bytes, hex 16#006C
(108, decimal)
7-8 Length of the NPB 2 bytes, hex 16#0014
(20, decimal)
General information
9 Internal system use 1 byte, hex
10 Internal system use 1 byte, hex
11-12 Reserved for STEP 7 Micro/WIN 32 2 bytes, hex
13-14 Common flag
Bit [0] Duplex mode
0:
Half duplex
1: Full Duplex
Bit [1] Data rate
0: 10 Mbit/sec
1: 100 Mbit/sec
Bit [2] Auto negotiation
0: No auto negotiation
1: Auto negotiation
Bit [3] BOOTP
0: Use configured network pa-
rameters
1: BOOTP
Bit [4-7] Not used
Bit [8-15] CRC validation
16#00 CRC check activated
16#AC CRC check deactivated
2 bytes, hex 16#0004:
Auto negotiation
Use configured net-
work parameters
CRC check activated
16#AC04:
Auto negotiation
Use configured net-
work parameters
CRC check activated
15-18 Configured IP address
This field should be set to
16#00000000 when BOOTP is being
used. 4 bytes, hex 192.12.45.23:
16#C00C2D17
19-22 Configured subnet mask
This field should be set to 4 bytes, hex 255.255.255.0:
16#FFFFFF00