Rockwell Automation 2707-M232P3_M485P3 DTAM Micro Operator Interface Module - Manual (Page 76)

Chapter 8
Troubleshooting and Maintenance
8–2
If there is no display on the DTAM Micro, verify that 18 to 30 VDC is
present at the terminal connectors. If not, check the power to/from the DC
power source.
The most common problems are related to cabling configurations and the
communication parameters (baud rate, data bits, parity). These parameters
must be identical for both the DTAM Micro and the controller. Cabling and
the communications parameters are always the first things to check.
If the communications cabling and communications parameters are correct,
perform the diagnostic tests (described in this chapter) to rule out any
non-functioning features of the DTAM Micro.
Refer to the following when the DTAM Micro displays an error message.
Message Probable Cause(s) Corrective Action(s)
ROM fail Read Only Memory (ROM) is incorrect.
Possible defective ROM. Reset the DTAM Micro
and re-check. If problem still exists, re-download
the operating system through the programming soft-
ware. If problem still exists, send DTAM Micro for
repair.
RAM fail RAM memory failed write or read test.
Reset the DTAM Micro and re-check. If problem still
exists, send DTAM Micro for repair.
*.CFG File Invalid Application file checksum is incorrect.
Possible bad application file. Download the pro-
gram (.CFG) file and re-check.
Watch Dog Fault
Push key to continue
Watch dog timer not within specs. If problem persists, send DTAM Micro for repair.
Watch Dog Fault
Push Key to Reset
Watch dog timer timed out or pass bits not set. If problem persists, send unit for repair.
Allen-Bradley SLC 50X
Establishing Comm
Attempting to communicate with an SLC.
Normal display when initiating communications with
an SLC.
Allen-Bradley PLC-5
Establishing Comm
Attempting to communicate with a PLC.
Normal display when initiating communications with
a PLC.
SLC not found
This display is displayed after a 2 second interval of
attempting to establish communications with the
SLC.
Communications not established with the SLC.
Check cabling and communications parameters
to verify that the SLC matches those of the DTAM
Micro.
PLC not found
This display is displayed after a 2 second interval of
attempting to establish communications with the
PLC.
Communications not established with the PLC.
Check cabling and communications parameters
to verify that the PLC matches those of the DTAM
Micro.
Communication Loss
Press ENTER to Reset
Communication with the SLC was lost after 16 at-
tempts. Check DTAM Micro to controller cabling. Check
SLC operating conditions.
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.
Attempted Invalid
Screen Access
Illegal or unprogrammed screen type detected
(.CFG file error). Check the program (.CFG) file and download.
Check linking and so on.
Common Operating
Problems
Error Messages