CONTREX ML-Drive - Manual (Page 97)

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Characters 5,6 - Parameter Number:
This is the Control Parameter code (i.e., enter “16” for CP–16).
Characters 7 through 10 - DATA:
These characters should always be “0”.
Character 11 - Data Format:
This character should always be “0”.
Character 12 - ETX:
Always use the ASCII “ETX” character to terminate the character string.