Beckhoff BK7300 User Manual download pdf (Page 37)

Appendix

BK7300 33

Watchdog register

If the watchdog timer on your slave has elapsed it can be reset by writing twice to register 0x1121. The

following must be written to the register: 0xBECF 0xAFFE. This can be done either with function 6 or with

function 16.

Bus coupler status 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

0x100C

FB: Fieldbus error, watchdog time elapsed

KB: terminal bus error

CNF: BK configuration window

2 byte PLC interface/

2 byte diagnostic interface

Registers in the complex terminals and bus coupler registers can both be

read or written using the 2 byte PLC interface. The complex terminal

registers are described in the associated terminal documentation. The bus

coupler registers can be used, for example, to read terminal bus

diagnostics data, the terminal composition or the cycle times, and the

programmed configuration can be written. It is also possible for a manual

terminal bus reset to be carried out. The 2-byte PLC interface requires two

bytes each of output and input data. They are handled using a special

protocol. A description of the 2 byte PLC interface, the registers available

in the bus couplers and of function blocks for various PLC that implement

the 2 byte PLC interface can be supplied on request.

The terminals' error messages can be sent over the 2-byte diagnostic

interface. Terminal bus diagnostics must however be activated for this

purpose. The 2-byte diagnostic interface occupies two bytes each of output

and input data. They are handled using a special protocol. A description of

the 2 byte-diagnostic interface can be supplied on request.

1 2 ... 32 33 34 35 36 37 38 39 40

No comments

Beckhoff BK7300 User Manual Page 37