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ControlLogix 7252 LDT Interface Manual
Revision 1.5
Message Configuration – (Communication Tab)
When the Configuration window shown above is completed, click on the Communication tab. The following window
will open. Click on the Browse button and set the path parameter to the slot where the 7252 module is located. All of
the remaining Communication parameters can remain at their default settings.
Extended Error Codes
The Message Instructions used to send data to the 7252 module have an error register that can be used to obtain
diagnostic information from the module. This register’s address is user_tag.exerr. The following table shows the
values that will be displayed in this register if the data sent to the 7252 module is not valid.
Extended Error Codes
1 = Configuration Bits Word Format Error
•
Reserved bits not equal to 0
•
Selecting one of the reserved LDT mode types
2 = LDT Gradient Value is outside of its valid range of 80000 to 99999
3 = Full Scale Length is outside of its valid range of
2 to 800 if the units are in inches
50 to 20320 if the units are in millimeters
4 = Full Scale Count is outside of its valid range of
2 to (1000 * Full Scale Length) if the units are in inches
2 to (10 * Full Scale Length) if the units are in millimeters
10 = Trying to program channel 2 when the rack configuration has defined the 7252 as a
one channel module. (This will be displayed as 16#0000_000A)
•
These error codes are only valid when register address user_tag.err is equal to 9.
•
The Message Instructions Error bit and the Extended Error Code can only be cleared by sending valid data to
the 7252 module.
