User manual

Transferring Data Using Communication Blocks
154
33002479 06 07/2008
Control Block for
SY/MAX Ethernet
Register Contents
CONTROL[1] Indicates an operation that is valid for SY/MAX
CONTROL[2] Indicates the error status
CONTROL[3] Indicates the length, i.e., the number of registers transferred (max. 100)
CONTROL[4] Indicates MSTR operation-dependent information
CONTROL[5] Routing register: used to specify a destination node during network transfer
Most significant byte: source node address, ie.e, the slot for the NOE
module
Least significant byte: destination node address, i.e, a value that
represents a direct or bridge address. If there is no bridge the value in the
least significant byte is set to 0. If there is a bridge, this value contains the
MBP for the Ethernet mapping index (MET).
If NOM is inserted in slot 7 on the module rack and the Ethernet mapping
index (MET) is 6, the routing register looks as follows (value 0x0706):
Most significant byte Slots 1 ... 16
Least significant byte MBP on Ethernet Transporter (MET) mapping
index
CONTROL[6] Destination drop number (or set to FF hex)
CONTROL[7] Terminator (set to FF hex)
0 0 0 0 0 1 1 1 0 0 0 0 0 1 1 0
most significant
byte
least significant
byte