Specifications

RSLinx – Training Guide A - 31
Configuration:
By configuring an Unsolicited DDE Topic in RSLinx, RSView32 can receive
unsolicited writes to the tag database.
1. The appropriate RSLinx communication driver must be configured
2. Select Topic Configuration from the DDE menu
3. Enter a new topic name.
4. Click the Update List button to browse for the correct PLC or SLC device
connection, and double click the device.
5. In the Data Collection Mode, make sure that both Poll Rate (msec) and
Unsolicited Messages are checked.
6. We recommend setting the Poll Rate to its maximum value 3600000 msec
(1 hour) for RSLinx 1.7, or a maximum value of 86400000 msec (24 hours)
for RSLinx 2.0
7. Configure a DDE type of node in RSView32 using RSLinx as the
Application and reference the Topic to the unsolicited topic name created in
RSLinx.
8. Create a Device tag in the Tag Database in RSView32.
9. For the SLC5, be sure the address of the Device tag is the same as the
Source File and Targets Destination File addresses as specified in the
Message Function configuration in RSLogix 500.
10. For the PLC5, be sure the address of the Device tag is the same as the
Data Table Addresses for This PLC5 and the Target device as specified in
the Message Function configuration in RSLogix 5 for PLC5.
Message Configuration Details:
When a processor is generating an unsolicited write, there are 2 addresses
specified. The first address indicates where the data is located locally, the
second address indicates where the data is to be written to. When using
Unsolicited and Polled DDE topics, both of these address MUST be the same.