What 1771-Sdn Module Data Tables Are And What They Do; The Scanner Configuration Table (Sct); The Scanlist Table (Slt) - Rockwell Automation DEVICENET 1771-SDN User Manual

1-8 Before You Begin
What 1771-SDN Module
Data Tables Are and What
They Do
Publication 1771-6.5.132 - June 2000
To manage the flow of data between your processor and the network
devices, the 1771-SDN module uses the following data tables.
1771-SDN Module Configuration Table
Scanlist Table
Device Input Data Table
Device Output Data Table
Device Idle Table
Device Failure Table
You can configure two of these data tables through RSNetWorx
software. These two tables are stored in the 1771-SDN module's
non-volatile memory and used to construct all other data tables:
Scanner Configuration Table (SCT)
Scanlist Table (SLT)

The Scanner Configuration Table (SCT)

The SCT controls basic information your 1771-SDN module needs to
function on your DeviceNet network. It tells your 1771-SDN module:
if it can transmit and receive input and output data
how long it waits after each scan before it scans the devices
again
when to send out its poll messages

The Scanlist Table (SLT)

The SLT supports I/O updating for each of your devices on the
network. It also makes it possible for your 1771-SDN module to make
device data available to your processor. The SLT tells your 1771-SDN
module:
which device node addresses to scan
how to scan each device (strobe, poll, change of state, cyclic or
any valid combination)
how often to scan your devices