Rockwell Automation 57C419 5V-24V DC Input Module User Manual

Page 30

Advertising

5Ć6

should have a clean transition, i.e. no overshoot or

undershoot.

Step 3.

Verify that the hardware is working correctly.
Verify thehardwarefunctionality by systematically

swapping out modules. After each swap, if the problem is

not corrected, replace the original module before

swapping out the next module.
To test local I/O, first replace the input module. Next,

replace the Processor module(s). If the problem persists,

take all of the modules except one Processor module and

theinput moduleout of thebackplane. If theproblem is

now corrected, one of the other modules in the rack is

malfunctioning. Reconnect the other modules one at a

time until the problem reappears. If none of these tests

reveals the problem, replace the backplane.

5.3.4

Illegal Interrupt Detected

Problem: All tasks in the chassis are stopped and error code 1F"

appears on the faceplate of the Processor module. A hardware

interrupt has occurred but no event has been defined.
Step 1.

Verify that the user application program is correct.
Verify that your interrupt response task contains an

EVENT statement to be executed. Check carefully to

determine whether a higher priority task is preventing the

interrupt responsetask from running. Makesurethat the

ordering of your statements agrees with the examples in

section 4.4.

Step 2.