FSBM wiring and programming example

This section demonstrates how to wire the Guard I/O module and program the instruction in the safety control portion of an application.

This application example complies with ISO 13849-1, Category 4 operation.

Wiring Diagram

The wiring diagram shows how to wire a light curtain and four muting sensors to a 1791DS-IB12 module to illustrate the use of the Four-Sensor Bidirectional Muting instruction. The application includes a hold-to-run switch and a momentary push button for reset.

Programming Example

The programming diagram shows the Four-Sensor Bidirectional Muting instruction used with a DCI Stop (light curtain) and DCI Start (hold-to-run switch) instruction.

Ladder Diagram

Module Definition

The following sections provide examples of how to use the programming software to set the Guard I/O module configuration operands.

When defining the module, setting the Input Status to Combined Status-Muting provides the smallest input packet possible and lets the muting lamp status be monitored. Choosing Test for Output Data lets safety logic control Test Output 3 to drive the Muting Lamp and Test Output 2 to drive the Clear Area Lamp.

Rockwell Automation

suggests using Exact Match, as shown. However, setting Electronic Keying to Compatible Match is allowed.

The safety inputs that interface with the Light Curtain (Points 1 and 2) are not pulse-tested because the Light Curtain pulse-tests its own signals.

Module Input Configuration

Configuring Test Output 3 for Muting Lamp causes the I/O module to monitor the lamp that is connected to this output.