User manual

Transferring Data Using Communication Blocks
164
33002479 06 07/2008
Control Block
Usage for TCP/IP
Ethernet
Control Block
Usage for SY/
MAX Ethernet
Register Meaning
CONTROL[1] 2 = read data
CONTROL[2] Indicates the error status.
CONTROL[3] Number of addresses to be read from the slave
CONTROL[4] Determines the %MW starting register in the slave from which the data is
read, e.g., 1 = %MW1, 49 = %MW49)
CONTROL[5] Routing register:
Most significant byte: network adapter module slot
Least significant byte: MBP on Ethernet Transporter (MET) mapping index
CONTROL[6]
...
CONTROL[9]
Each address contains 1 byte of the 32-bit IP address, where the MSB is
in CONTROL[6] and the LSB is in CONTROL[9].
Register Meaning
CONTROL[1] 2 = Read data
CONTROL[2] Indicates the error status.
CONTROL[3] Number of addresses to be read from the slave
CONTROL[4] Determines the %MW starting register in the slave to which the data is
written, e.g., 1 = %MW1, 49 = %MW49).
CONTROL[5] Routing register
Most significant byte: network adapter module slot
Least significant byte: destination drop number
CONTROL[6]
...
CONTROL[9]
Terminator: FF hex