TSSM wiring and programming example

TSSM wiring and programming example

This example complies with ISO 13849-1 Category 4 operation. The standard control portion of the application is not shown.
This wiring diagram shows how to wire a light curtain and two muting sensors to a 1791DS-IB12 module to illustrate the use of the Two Sensor Symmetrical Muting instruction.
TSSM wiring example
Programming Example
This programming diagram logically illustrates how the Two Sensor Symmetrical Muting instruction is typically used with a DCI Stop (light curtain) and DCI Start (hold-to-run switch) instruction.
TSSM Programming Diagram
Ladder Diagram
TSSM_Other_Ladder Diagram_v31
TIP:
The tag in the preceding diagram is an internal Boolean tag that represents the nonhazardous portion of the machine cycle. Its value is determined by other parts of the user application that are not shown in this example. When the protected hazard is present, the tag value should be False (0). When the protected hazard is not present, this tag value should be true (1). When the value of the tag is true (1), the muting instruction allows the light curtain to become muted only if the proper input sequence is detected. When the value of the tag is False (0), the muting instruction does not allow the light curtain to become muted, even if the proper input sequence is detected.
The programming software is used to configure the input and output parameters of the Guard I/O module, as illustrated.
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.
Module Definition
TSSM_mod_input_config_v31
Rockwell Automation
 suggests selecting
Exact Match
 for the
Electronic Keying
 as shown. You can also select
Compatible Match
.
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
TSSM_Mod_testout_config_v31
Configuring Test Output 3 for Muting Lamp causes the I/O module to monitor the lamp that is connected to this output.
Module Test Output Configuration
TSSM_mod test out config_v31
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