Chapter 7
Troubleshooting and Maintenance
7–3
Message
Corrective Action(s)
Probable Cause(s)
Com Error Code: nnH
Press ENTER to Reset
Communication error code (nn)
Received a controller error code. Refer to next sec-
tion for error codes.
Attempt Was Made to
’
Call
’
An
Invalid Or Unprogrammed Screen
Illegal or unprogrammed screen type detected
(.CFG file error).
Check the program (.CFG) file and download.
Check screen links.
NAchip Set:Failed
Internal fault.
Contact Allen-Bradley for technical support.
Not Programmable
Master code is 99999999 and is not user-program-
mable.
A master code number of 99999999 may not be
changed from the keypad. Download a new, valid
master code number (using DPS Programming Soft-
ware).
Not Responding
Press
”
Y
”
to Reset
”
ENTER
”
To Continue
Communications fault.
Check cabling and retry.
Incorrect Master
Code
Master code entry did not match.
The master code entered did not match the master
code of the program file.
Invalid File Type
<Check CFG File>
Press
”
Y
”
to Reset
Attempt was made to access an invalid file type.
Check application file. Refer to DPS user manual
for the file types that can be accessed.
Invalid Security
Code Access Denied
Master code or screen code did not match.
Either an incorrect master security code or a screen-
code that did not match the programmed screen
code was entered. Try again.
Loop Error
XX
The Communications Port test the transmitted char-
acter did not match the received character. The
transmitted character is displayed.
Verify that the loopback connector is connected to
the Communication and/or Printer Ports. If the loop-
back connectors are in place, possible damage to
the port drivers has occurred, send unit for repair.
** Input Error **
Press a Key to Cont.
The low and high data values are then dis-
played in one of two formats:
Low Lim High Lim
XXXXXX XXXXXX
Low XXXXXXX
High XXXXXXX
The data entered is not within the programmed lim-
its. The programmed Low and High limits are dis-
played.
Verify that the displayed limits are as programmed
for the entry field. Re-enter data within the entry
limits.
READ ONLY
The controller location is not configured for a Write
function (P-A/D function).
Verify that the controller location being accessed by
the P-A/D is acceptable for Write functions.
Prog SW/OI Version
Mismatch -OI Locked
An incorrect unlock code sent by DTAM Plus Pro-
gramming Software. Wrong version of DTAM Plus
Programming Software
Verify that the version of DTAM Plus Programming
Software is compatible for the controller type sup-
ported by the DTAM Plus.
Password Inhibited
Controller has at least one ladder program file that
is password protected.
Remove password protection.
Working
(Displayed for Long Period)
Comm port setting may be incorrect
DH-485 communication problems
Data entry screen has no data entry field
Check communication settings.
Verify connections and settings.
Reload corrected application file.
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