Omron C200HW-CLK21 Operation Manual page 236

Commands and Responses for C200HX/HG/HE and CQM1H-series PLCs
Memory area Data
DM Area Word contents
Expansion DM Word contents
Word/Bit Addresses
Memory Area Code
Number of Bytes/Element
Data area address
DM 0000 to DM 6655
EM 0000 to EM 6143
Note The meanings of the memory area codes for the Expansion DM area are
shown in the following table. Only the current bank (98) or bank 0 (90) can be
specified for CQM1H-series PLCs.
Memory area code
90 to 97
98
A8 to AF
Memory area size varies depending on the PLC model. For details, refer to
the operation manual of the specific PLC that is being used.
Each word/bit address specifies a specific bit or word.
Specify the the bit between 00 and 0F (Hex) (decimal: 00 to
15). Set to 00 (Hex) to specify word or flag data.
Specify the address of the word or flag.
To obtain the corresponding address of the desired word or bit, add the data
area word address (hexadecimal) to the first address of the range of
addresses used for that data area in communications. For example, the
address for word AR 13 is computed as follows:
First address for AR area;
048C + 0D (13 in BCD);
The word address for AR 13 would be 04990C (Hex) (the memory area code
would specify this as a word) and the address of bit 12 (C Hex) in AR 13
would be 04990C (Hex).
The unit of access (bit or word) and the data code are specified as shown in
the following illustration.
7
Bit
Access unit
00: Bit
10: Word
The number of bytes of read or write data per element is as follows depending
on the access unit.
1 Byte/element for bit access
2 Bytes/element for word access
Address used in
communications
1st and 2nd
bytes
0000 to 19FF 00 to 00
0000 to 17FF 00 to 00
Banks 0 to 7
Current bank
Banks 8 to 15
048C (Hex)
0499 (Hex)
6 5 4 3 2 1 0
Data code
00: CIO, LR, HR, or AR area
01: Timer or Counter area
02: Data Memory area
10 to 17, 18, and 27 to F: Expansion DM
Section 6-6
Memory
area code
3rd byte
82
90 to 97, 98,
and A8 to
AF (See
note.)
Meaning
No. of
bytes
2
2
213