DCST wiring and programming example

DCST wiring and programming example

This topic demonstrates how to wire the Guard I/O and program the instruction in the safety control portion of an application
This application example complies with ISO 13849-1, Category 4 operation.
TIP:
The standard control portion of the application is not shown in the following diagram.
Wiring Diagram
DCST Wiring diagram
Programming Diagram
This programming diagram shows the Dual Channel Input Stop with Test (DCST) instruction with inputs and test outputs.
dc
Ladder Diagram
DCST_LD_other_v31
TIP:
The tag in the preceding table is an internal Boolean tag that has its value determined by other parts of the user application not shown in this example. The falling edge (1->0) of the Test Request input forces a test to be executed (safe state must be observed). Connecting this input to the output that enables the hazard forces a test to be executed every time the hazard is stopped.
The programming software is used to configure the input and output operands of the Guard I/O module as illustrated.
Module Definition
The following sections provide examples of how to use the programming software to set the Guard I/O module configuration operands.
DCST_mod def_v31
Rockwell Automation
 suggests selecting
Exact Match
 for the
Electronic Keying
 as shown.
Compatible Match
is also acceptable.
Module Input Configuration
DCST_mod inp config_v31
Module Test Output Configuration
DCST_mod test output_v31
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