Mitsubishi Electric QJ71E71-100 User Manual page 121

● Multiple Length elements can be placed in a packet.
● When there is no element other than a Length element, an element error occurs.
(To use a Length element, one or more element(s) other than Length is/are required.)
● When the number of digits of calculation result is greater than that specified in "Data Length", digits greater than the
specified digit are omitted (ignored).
For example, if the data length is 2 bytes and the data size calculation results are "123" bytes, the data length will be "23".
● When a Non-conversion Variable (Variable length) or Non-verified Reception (Variable number of characters) is placed
behind a Length and is not included in the Length calculating range, place Static Data immediate after the Non-
conversion Variable or Non-verified Reception.
● When "Code Type" is "ASCII Hexadecimal", a corresponding packet is regarded as a mismatch packet if a string except
for "0" to "9", "A" to "F", and "a" to "f" is received.
● When sending data converted to ASCII characters, use "0" to "9" or "A" to "F".
● When multiple Length elements are placed, the calculating range cannot be set as follows:
• A Length calculating range overlaps the others.
• The calculating range of a Length is greater than that of the Length placed before.
● Length element cannot be placed at the end of the packet elements.
CHAPTER 11 DATA COMMUNICATIONS USING THE PREDEFINED PROTOCOL
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