Non-Verified Reception - Mitsubishi MELSEC iQ-F FX5 User Manual

Item Description
Data Flow Forward Direction
(Upper Byte → Lower Byte)
Reverse Direction
(Lower Byte → Upper Byte)
Byte Swap
(by Word)
Complement Calculation Select the complement calculation.
• No Complement Calculation
• One's Complement
• Two's Complement
Calculating Start Select the starting element number of the calculating range.
Range The range is 1 to 32.
End Select the ending element number of the calculating range.
The range is 1 to 32.
Considerations for configuring packet element
• Only one check code can be placed in a packet.
• A check code can be placed in any position of the data portion or after a terminator. However, one or more elements are
needed before the check code.
Caution
• When Code Type is [ASCII Hexadecimal], an error may occur if a string other than '0' to '9' 'A' to 'F' 'a' to 'f' is received.
• When Code Type is [ASCII Decimal], an error may occur of characters if a string other than '0' to '9' is received.
• When a calculated check code (Sum check/Horizontal parity/16-bit CRC) does not match a received check code, a error
may occur.

Non-verified reception

Use this element when received data includes unnecessary data while receiving data.
CPU module skips the specified number of characters if a receive packet includes a non-verified reception.
For data examples of non-verified reception, refer to Page 255 Data examples of Non-verified reception.
Window
Item Description
Element Name Set the name of the element.
Data Length 0 (variable number of characters)
1 to 2048 (specified number of characters)
When Sends a calculated check code, from the lower byte.
sending
When Handles received data as a check code, from the upper
receiving byte.
When Sends a calculated check code, from the lower byte.
sending
When Receives data from the lower byte.
receiving
When Sends a calculated check code by swapping the upper
sending byte and lower byte by word.
When Receives data by swapping the upper byte and lower
receiving byte by word, and handles as a check code.
Set this item when the number of characters not to be verified varies in each
communication.
Set the number of characters not to be verified.
7 PREDEFINED PROTOCOL SUPPORT FUNCTION
Remarks
Not settable when
Processing Method is
16-bit CRC (for
MODBUS), or when the
Data Length is set to 1
(byte).
Not settable when
Processing Method is
16-bit CRC (for
MODBUS), or when the
Data Length is set to 1 to
3 (byte).
Not settable when
Processing Method is
16-bit CRC (for
MODBUS).
Refer to Page 254.
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7.7 Packet Setting
7