Mitsubishi Electric MELSEC iQ-F Series FX5 User Manual page 35

Data of data area (when communicating in binary code)
■In the case of reading
Data area (corresponding to character area A)
External
*
equipment
L H L -
CPU module
■In the case of writing
Data area (corresponding to character area C)
External
*
equipment
L H L -
CPU module
The data array and the data contents marked with * are shown in Page 15 Message Format.
Data contents common to character areas
■Subcommand
Subcommands are data for specifying the unit for reading and writing, device type to be specified, and the data reading
condition.
The following table shows the details of setting items.
Setting item
Data size specification Word units
Bit units
Device specification 2 digit code/6 digit
format number
specification
4 digit code/8 digit
number
specification
Device memory Not specified
extension specification
Specified
H L H
*
H L H
Description
• The target data is read or written in word units.
• Select "0" even when the reading data or writing data does not exist in arguments of the command.
The target data is read or written in bit units.
Data or items related to the address specifications are expressed in the following sizes, which are the same
as the existing setting.
• Device code: 1 byte in binary
• Device number: 3 bytes in binary
Data or items related to the address specifications are extended to the following size.
• Device code: 2 byte in binary
• Device number: 4 bytes in binary
Set this when specifying devices of a CPU module.
* Set this when not using the device memory extension specification.
• Set this for the buffer memory specification of the intelligent function module.
• This setting corresponds to the buffer memory indirect specification with index register.
Data area
(corresponding to
character area B)
*
3 MESSAGE FORMAT
33
3.1 Message Format
3