Rockwell Automation 1755-OF8 GuardPLC Controller Systems - Manual (Page 101)

101 Publication 1753-UM001C-EN-P - March 2010 101
Chapter
11
Pulse Testing
Introduction
Pulse testing is a high-frequency diagnostic test that can detect wiring
faults on input devices before demand is placed on the safety system.
There are two ways to generate a pulse test in the GuardPLC family of
products.
•
By using Redundant Pulse Test Output (RPTO) and Single Pulse
Test Output (SPTO) certified function blocks in the application
program
•
By using the services built into the GuardPLC 1600 and
GuardPLC 2000 controllers’ operating systems
This table lists the pulse test methods available for your product.
Pulse testing cannot be configured on the GuardPLC 1200 and
GuardPLC 1800 controllers, or on the 1753-OB16 output-only module.
The GuardPLC 1800 controller is excluded because it features digital
inputs that are actually analog inputs with 1-bit resolution.
You can choose between the two methods for pulse testing the
GuardPLC 1600 controller and distributed I/O modules (catalog
numbers 1753-IB16, 1753-IB8XOB8, 1753-IB16XOB8, and
1753-IB20XOB8) controlled by the GuardPLC 1600 controller. You
also have the choice of methods for the GuardPLC 2000 controller and
1755-IB24XOB16 module.
Topic Page
Response to OS Configurable Faults 102
Wire for OS Configurable Line Control 103
Input Configuration for Pulse Testing 105
Controller RPTO/SPTO Function Blocks OS Configurable
GuardPLC 1200 yes no
GuardPLC 1600 yes yes
GuardPLC 1800 yes no
GuardPLC 2000 yes yes