Rockwell Automation 1769-SM2 Compact I/O DSI/Modbus Communication Module - Manual (Page 66)

5-2 Understanding Explicit Messaging
For RSLogix 500, format each message as shown in Figure 5.1 and see
Table 5.A for a description of the data required in each field. For
RSLogix 5000, format each message as shown in Figure 5.2 and see
Table 5.B .
Figure 5.1 RSLogix 500 Explicit Message Setup Screen
Formatting Explicit Messages
Table 5.A RSLogix 500 Explicit Message Configuration Data
This Controller Section Description
Channel Always use “Expansion Comms Port.”
Slot The chassis slot occupied by the 1769-SM2 module.
Port Always set to “2.” Note: This field was not configurable in earlier
versions of RSLogix 500.
Communication Command Always use “CIP Generic.”
Data Table Address (Receive) The file and element where response service data (if any) is stored.
Size in Bytes (Receive) Number of bytes of response service data (if any).
Data Table Address (Send) The file and element where request service data (if any) is stored.
Size in Bytes (Send) Number of bytes of request service data (if any).
Target Device Section Description
Message Timeout The timeout delay in seconds.
Target Type Always use “Network Device.”
Net Addr The number of the channel (1…3) on the 1769-SM2 module where
the message will be sent. Note: This field was called “Channel” in
earlier versions of RSLogix 500.
Service (Text or hex) Code for the requested service.
Class (hex or dec) The Class ID.
Instance (hex or dec) Instance number is the same as the parameter number.
Attribute (hex or dec) Attribute number.