com.ergotech.vib.servers.ab

Class ControlLogixAddressBlock

java.lang.Object

com.ergotech.vib.servers.plc.PLCAddressBlock

com.ergotech.vib.servers.ab.ControlLogixAddressBlock

public class ControlLogixAddressBlock
extends PLCAddressBlock

This is the address block for the Control Logix protocol. It maintains an image from the PLC that it refreshes on a periodic basis.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	cvsRev

Fields inherited from class com.ergotech.vib.servers.plc.PLCAddressBlock

debugLevel, errorCount, executorThreadCount, FULL, globalUniqueID, HIGHER, imageSize, LOWER, MUCH_HIGHER, MUCH_LOWER, NOT_APPROPRIATE, packetCount, readServers, startAddress, uniqueID, WITHIN, writeServers

Constructor Summary

Constructors

Constructor and Description
ControlLogixAddressBlock(ControlLogixServer server) Constructor.

Method Summary

Modifier and Type	Method and Description
int	add(PLCServer server, boolean refresh) Add the address.
int	addressLocation(int address, int size) Returns "WITHIN".
int	getImageSize() For this address block, the image size is just the number of servers.
java.lang.String	toString() Return an intelligent description.

Methods inherited from class com.ergotech.vib.servers.plc.PLCAddressBlock

_refreshImage, canBeAdded, canBeAdded, getBlockType, getDirty, getMaximumBlockSize, getTimer, isAppropriateAddress, isDirty, isStarted, refreshImage, remove, requestRefresh, setDirty, setMaximumBlockSize, start, tick

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

cvsRev

public static final java.lang.String cvsRev

See Also:

Constant Field Values

Constructor Detail

ControlLogixAddressBlock

public ControlLogixAddressBlock(ControlLogixServer server)

Constructor.

Parameters:

startAddress - the starting address of the block.

Method Detail

add

public int add(PLCServer server,
               boolean refresh)

Add the address. This first checks if the address could be added to this address block. If the address is NOT_APPROPRIATE or the block is FULL then it will not be added, and these values will be returned.

Overrides:

add in class PLCAddressBlock

Parameters:

server - the address to add

refresh - whether to update the block after adding the address

Returns:

an integer that is the distance from the block of the new address

addressLocation

public int addressLocation(int address,
                           int size)

Returns "WITHIN". Addresses are not used for ControlLogix.

Overrides:

addressLocation in class PLCAddressBlock

Parameters:

address - the address to add

Returns:

the offset from the block. This can be negative if the address is below the current address block.

getImageSize

public int getImageSize()

For this address block, the image size is just the number of servers.

Overrides:

getImageSize in class PLCAddressBlock

toString

public java.lang.String toString()

Return an intelligent description.

Overrides:

toString in class PLCAddressBlock