ATI Technologies Q46N Manual de comunicaciones - Página 9

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ATI

Q46 Ethernet/IP Communications Manual

1.7

PLC Settings

PLCs handle this exchange in a wide variety of configurations, and the

configuration of a class 1 connection in every PLCs software is different, but

there should be a place to enter the following information. If this doesn't seem to

make sense, follow the explicit info above.

Data Type: "INT" or "16-Bit"

Input T->O Assembly Instance: 0x65 or 101 decimal

Input T->O Size: 11 words (16-bit)

Output O->T Assembly Instance: 0x66 or 102 decimal

Output O->T Size: 1 word (16-bit)

Configuration Assembly Instance: 0x80 or 128 decimal

Configuration Size: 0

*Note that there may be a byte swap occurring on each set of registers as

Ethernet/IP is Little Endian (see parse above in section 1.6). So you may have to

byte swap each 16-bit register to recombine the data.

**Note that section 1.6 shows that first raw 4 header bytes as being ignored, as

the raw bytes are all shown with a Molex PC tool. The 2 raw bytes will show on

the PLC, and are simply an internal status register. So, actual data shows right

after those 6 bytes.

Note that some Ethernet/IP Master simulators such as EIP Scan do not have

data type settings, everything is in bytes. In that case, the input above would be

22 instead of 11. Make sure to double check whether entry values are in hex or

decimal.

1.8

The Q46 acquires a dynamic network IP address from the network client/master

through the BOOTP service, which is enabled by default for ODVA EIP-CIP

conformance. However, a fixed IP can be set using BOOTP on a PC.

BOOTP is a very simple software server application that waits for a specific MAC

address to appear on the network, and then assigns it a pre-determined IP

address that has been set-up by the user. In the most actual applications,

BOOTP runs right on the PLC alongside tools like Rockwell's Studio 5000. For

manual fixed settings, this same BOOTP server tool can be easily run on a PC.

The current Rockwell version of this tool (recommended) is –

"BootP-DHCP Ethernet/IP Commissioning Tool Version 3.03.00"