Rockwell Automation GMLC Reference Manual - Manual (Page 435)

Publication GMLC-5.2 - November 1999
398 SLC Blocks
The Show SLC Status block resides on the SLC Palette. It requires no
parameters, and has no dialog box. This block requires no parameters and
it always has a check mark by the upper left corner of the block to indicate
that it is complete.
If you selected SLC in the General page of the Configure Control Options
dialog box, you can use the Show SLC Status block to check the SLC
interface and send the resulting status value to the operator interface serial
port.
On SLC Status
If you enabled SLC in the General page of the Configure Control Options
dialog box, you can use the On SLC Status block to:
•
Pause execution of the current task at this block until the SLC attains
a specified SLC status condition (Wait for SLC Status Type).
• Branch program flow from this block, depending upon whether a
selected SLC status is true or false (If SLC Status Type).
The On SLC Status block is on the SLC Palette.
Wait for SLC Status Type
Use the Wait for SLC Status type block to check for an SLC fault.
The Wait for SLC Status halts execution of the current task until the
specified SLC status, Programmed, Run, or Fault, (see below) is true. If
other blocks are executing (multitasking), only the task that contains this
block pauses, while other tasks continue to execute. A Wait for SLC type
block in one task does not halt execution of any other tasks, or hang the
task dispatcher.
When you select the Wait for SLC Status type, the block has a single exit
node.