Rockwell Automation Current Input Module - Manual (Page 49)

5Ć1
5.0 DIAGNOSTICS AND
TROUBLESHOOTING
This section explains how to troubleshoot the module and field
connections. If you cannot correct the problem usingthe instructions
below, the module is not userĆserviceable. If the procedure calls for a
component to be swapped with a replacement part and the problem
is not corrected, replace the original component and go on to the
next step.
5.1 Incorrect Data
Problem: The data is always on, always off, or different than
expected. The possible causes of this are a module in the wrongslot,
a programming error, or a malfunctioning module. It is also possible
that the transmitter is either not wired or is wired incorrectly. Use the
followingprocedure to isolate the problem:
Step 1.
Connect the programming terminal to the system and run
the ReSource Software. Determine whether the channel is
configured by examining register 21. If it is not, use the
procedure in section 4.2 to configure the channel.
Step 2. For DCS 5000/AutoMax systems, verify that the module
configuration is correct. Verify that the Current Input
module is in the correct slot.
Verify that the slot number beingreferenced agrees with
the slot number of the module.
For remote I/O installations, verify that the master slot and
remote drop numbers are defined correctly.
Step 3. Verify that the field wiringis properly connected.
DANGER
THIS EQUIPMENT IS AT LINE VOLTAGE WHEN AĆC POWER IS CONNECTED.
DISCONNECT AND LOCK OUT ALL UNGROUNDED CONDUCTORS OF THE AĆC
POWER LINE. FAILURE TO OBSERVE THESE PRECAUTIONS COULD RESULT IN
SEVERE BODILY INJURY OR LOSS OF LIFE.
Turn off power to the module.
Confirm that all terminal board connections are tight.
Check the cables for continuity between the faceplate
connector and the terminal board assembly.
Turn on power to the module.
Step 4. Check for an input out of range condition.
Monitor register 20. Use the MONITOR function in
DCS 5000/AutoMax systems or the POINT MONITOR
function in AutoMate systems.