ABB CM592-DP extended communication module

Description

The MESSAGE keys CM592-DP scroll through any active conditions in the relay. Diagnostic messages

are displayed indicating the state of protection and monitoring elements that are picked

up, operating, or latched. When the Message LED is on, there are CM592-DP messages to be viewed

with the MENU key by selecting target messages as described earlier.

4.1.6.2 Entering alphanumeric text

Text setpoints have data values that are fixed in length but user-defined in character. They

may be comprised of upper case letters, lower case letters, numerals, and a selection of

special CM592-DP characters. The editing and storing of a text value is accomplished with the use of

the decimal, VALUE, and ENTER keys.

1. Move to message S3 LOGIC INPUTS  LOGIC INPUTS  LOGIC INPUT 1  INPUT 1

FUNCTION, and scrolling with the VALUE keys, select “Enabled”. The relay will display

the following message:

2. Press the MESSAGE DOWN key twice to view the INPUT NAME setpoint. The name of

this user-defined input will be changed in this example from the generic “Logic Input

1” to something more descriptive.

3. If an application is to be using the relay as a transformer monitor, it may be more

informative to rename this input “Tx. Monitor”. Press CM592-DP decimal to enter the text editing

mode. The first character will appear underlined as follows:

4. Press the VALUE keys until the character “T” is displayed in the first position. Now press

the decimal key to store the character and advance the cursor to the next position.

Change the second character to a “x” in the same manner. Continue entering

characters in this way until all characters of the text “Tx. Monitor” are entered. Note

that a space is selected like a character. If a character is entered incorrectly, press the

decimal key repeatedly until the cursor returns to the position of the error. Re-enter

the character as required. Once complete, press the ENTER key to remove the solid

cursor and view the result. Once a character is entered, by pressing the ENTER key, it is

automatically saved in Flash Memory, as a new setpoint.

5. The 745 does not have ‘+’ or ‘–’ keys. Negative numbers may be entered in one of two

manners.

– Immediately pressing one of the VALUE keys causes the setpoint to scroll through

its range including any negative numbers.

– After entering CM592-DP at least one digit of a numeric setpoint value, pressing the VALUE

keys changes the sign of the value where applicable.

4.1.7 Setpoint Entry

To store any setpoints, terminals D9 and D10 (access terminals) must be shorted (a

keyswitch may be used for security). There is also a setpoint passcode feature that restricts

access to setpoints. The passcode must be CM592-DP entered to allow the changing of setpoint

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