Table of contents
4
BC7300
Unsent Slave Answers (Sub-Function 15)
36
Number of Error Answers (Sub-Function 16)
36
BC7300 Error Answers
37
4. Bus Terminal Controller
38
PLC Cycle Time
38
PLC Variables
38
Remanent Variables
38
Persistent Data
39
Allocated flags area
40
5. Appendix
41
MODBUS Interface
41
Mapping the Bus Terminals
42
List of references
42
Firmware
42
Table
42
Example Program
43
Explanation of the Program
43
The Program in the Bus Terminal Controller
43
Creating the BOOT Program
44
MODBUS Communication
44
6. Questions and Answers
46
General
46
No communication with the BC7300
46
Mapping of the digital and the byte-oriented Bus Terminals onto a fixed
address
46
Drop of the digital outputs
46
7. Index
47
8. Support and Service
48
Support and Service
48
Beckhoff's branch offices and representatives
48
Beckhoff Headquarters
48
