Mitsubishi Melsec-L Series User Manual page 134

Item
Element Name Set a name of the element.
Select a calculating method.
Processing Method
Horizontal parity/Sum check/16-bit CRC (for MODBUS)
ASCII Hexadecimal
Code Type ASCII Decimal
HEX
Select the data length on the line (byte).
Data Length
The range is 1 to 4.
Forward direction
(Upper byte
Data Flow
Reverse direction
(Lower byte
9 - 24
(7) Check Code
Use this element when an element indicating check code data is included in a
packet.
The C24 automatically calculates a specified check code at timing of
sending/receiving, and adds it to a send packet or detects an error of a receive
packet.
The following table lists the items.
When sending: Select a format in which a
When receiving: Select a format in which data
When sending: Sends a calculated check
When receiving: Manipulates receive data as a
Lower byte)
When sending: Sends a calculated check
When receiving: Manipulates receive data as a
Upper byte)
9 DATA COMMUNICATION USING THE PREDEFINED PROTOCOL
Description
calculated check code is sent.
are received.
code, from the upper byte.
check code, from the upper
byte.
code, from the upper byte.
check code, from the upper
byte.
Effective only if the data length
is 2 to 4 (bytes).
Remark
-
-
Not settable when
"Processing Method"
is "16-bit CRC (for
MODBUS)"
Not settable when
"Processing Method"
is "16-bit CRC (for
MODBUS)"
Not settable when
"Processing Method"
is "16-bit CRC (for
MODBUS)", or when
the "Data Length" is
set to "1 (byte)".
9 - 24