BECKHOFF BC7300 - Manual (Page 4)

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