Rockwell Automation 1203-CN1 ControlNet Communications Module 1203-CN1 - Manual (Page 81)

Publication 1203-5.13 – February, 2002
Appendix
B
1203-CN1 Module Parameters
Appendix Objectives Appendix B provides information on the 1203-CN1 SCANport to
ControlNet module’s parameters. The information includes:
• Discussion of datalinks.
• Discussion of Fault Configurable inputs.
• List of parameters.
What Are Datalinks? Datalinks let you increase the scheduled I/O values to and from a
SCANport device (provided the SCANport device supports
datalinks). By enabling datalinks, you can continuously change or
monitor the value of a parameter without using the ControlNet to
SCANport messaging function.
Each datalink consists of two 16-bit words of input and two 16-bit
words of output when enabled. Up to eight words in and eight words
out of data are available if supported in the connected SCANport
device.
SCANport devices that support this function have a group of
parameters for datalink configuration. These parameters are Data In
A1 – D2 and Data Out A1 – D2.
If you intend to use datalinks, you must do the following:
1. Enable desired DataLink parameters within the 1203-CN1
module. Refer to Chapter 3, Getting Started, for instructions on
editing parameters.
2. Configure or link the Data In A1 – D2 and Data Out A1 – D2
parameters in the SCANport device. Refer to the documentation
for your SCANport product.
3. Set the Input Size and Output Size to the correct values in
RSNetWorx. Refer to Chapter 4, Configuring a Controller to
Communicate with the 1203-CN1 Module, for instructions on
setting these.
What Are Fault Configurable
Inputs? You can select constant values that your 1203-CN1 module will
maintain in the event of a controller mode change or error. These
constant values are referred to as Fault Configurable inputs. When the
controller is placed in program mode or a ControlNet network fault
occurs, the control outputs from the module to the SCANport product
can be set to automatically switch to the constant values set in the
Fault Cfg In parameters. This lets you define a safe operating state for