Beckhoff CX1100-000x Bedienungsanleitung PDF herunterladen (Seite 38)

Product overview

36 Embedded PC

The IP-Link Control Block (CB IP-Link)

This section describes the layout of the control block for the IP-Link bus of CX1100-0003. This control block is

located in the memory just below the I/O region of the K-bus interface.

CB IP-Link

Offset Default

0xFB0[2] IPL 2 byte plc interface to CX1100-0002/3

0xFB2[2] IPL 2 byte plc interface from CX1100-0002/3

0xFB4[2] IPL diagnosis to CX1100-0002/3

0xFB6[2] IPL diagnosis from CX1100-0002/3

0xFB8 IPL service request bitfield

0xFB9 IPL service response bitfield

0xFBA IPL error code

0xFBB IPL error argument

0xFBC[2] IPL base ptr Inputs 0x400

0xFBE[2] IPL base ptr Outputs 0x700

0xFC0-0xFC1 IPL cycle count

0xFC2-0xFC3 IPL cycle time [µs]

0xFC4 IPL bus status

0xFC5-0xFCE Reserved

0xFCF Retry counter

IP-Link 2 byte plc interface to CX1100-0003 / IP-Link 2 byte plc interface from

CX1100-0003

These two bytes for each direction - from the main CPU to CX1100 and back - special communication with the

The so called register model description can be found in the hardware description manuals of the terminals and bus

couplers. This communication is typically used for extended diagnosis or configuration of terminals if they need to

deviate from the delivery standard, e.g. changing the baud rate for RS232-terminals or gain/offset values with analog

terminals.

IP-Link diagnosis to CX1100-0003 / IP-Link diagnosis from CX1100-0003

With these two bytes in each direction it is possible to retrieve diagnostic information from the attached terminals.

Since the same diagnostic information is reflected in the process image input area per each terminals, there is in

general no need to use this interface.

IP-Link service request bitfield / IP-Link service response bitfield

IThese two bytes contain a sequence of bits, by which certain service functions may be executed. The service

function is invoked by setting the appropriate request bit, the controller executes and sets the response bit. Before

the same function can be invoked again, the request bit must be set to zero and wait until the response bit is also set

to zero. An execution error is signaled by raising response bit 7.

Bitfeld Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

Request - - - - - - Free Run Reset Bus

Response Error - - - - - Free Run Active Reset Done

Reset Bus:

with this bit, a reset of the K-Bus may be performed. This is necessary after the occurrence of an error (detected by

examination of the "Processdata error"-byte in the GCB) e.g. after a terminal has been pulled out. After performing

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