Setup
Document No. D106-009
Page 30 of 76
Revision 1.15
NOTE
: When doing a single/multiple coil/discrete write to a Logix Bool array
datatype the remaining bits of the 32-bit aligned Bool array will be overwritten.
Next the range of Modbus data to be accessed must be specified. This is achieved by selecting
a
Register Start
and
Element Count
.
If the Modbus
Element Count
is 1, it is possible to map a single integer register to a single
integer tag. All other combinations will require a Logix tag array to be selected.
Below is an example of the target tag selection. The Target Tag can be either entered manually
or selected using the Tag Browser in Slate. The Tag Browser requires the controller to be
available on the network.
To browse to the tag, click on the Browse button. The Tag Browser will open and scan all the
tags inside that controller. If the controller has been recently scanned in this Slate session,
then a cached version of the tags will be displayed. A rescan of the tags can be triggered by
selecting the Refresh button in the Tag Browser’s toolbar.
Only tags of a relevant type will be enabled, guiding the user to select a suitable tag.
Figure 3.21 – Tag Browser tag selection
The figure below is an example of how Modbus messages are routed to the Logix tags using
the Reactive Tag Map mode.