Omron CPM2C-S100C Operation Manual page 145

Explicit Message Communications
Response Format
Source node number
Number of bytes received
Parameters
Destination node number (command)
Specify the node number of the CPM2C-S containing the desired data in 1
byte (2-digit hexadecimal).
Service code (command, response)
Specify 1C (Hex) in the command.
The leftmost bit of the service code is turned ON in the response, so 9C (Hex)
is returned.
Class ID (command)
Always 2F (Hex).
Instance ID (command)
Specify the data area containing the desired data in 1 byte (2-digit hexadeci-
mal). Use one of the codes listed in the following table.
Code Area name
01 (Hex) IR area
02 (Hex) IR area
03 (Hex) DM area
04 (Hex) LR area
05 (Hex) HR area
06 (Hex) AR area
07 (Hex) Timer/Counter area
Address L and Address H (command)
Specify the starting word address of the read data in hexadecimal as follows:
Address L: The rightmost two digits of the 4-digit starting address.
Address H: The leftmost two digits of the 4-digit starting address.
Number of bytes (command)
Specify the number of bytes of data to read in 1 byte (2-digit hexadecimal).
The allowed range is 01 to C8 (Hex), which is equivalent to 1 to 200 decimal.
Number of bytes received (response)
Indicates the number of bytes of data (in hexadecimal) from the "source node
number" on.
Source node number (response)
Indicates the node number (in hexadecimal) of the CPM2C-S that returned
the response.
Read data (response)
Contains the desired data read from the specified data area. Word data is
returned with the leftmost byte (bits 8 to 15) preceding the rightmost byte (bits
0 to 7). If an odd number was specified in the command's "number of bytes"
parameter, the last byte of read data will contain the leftmost byte of a word.
Leftmost
byte
Service code Rightmost byte
Read data
(200 bytes max.)
IR 000 to IR 049
IR 200 to IR 227
DM 0000 to DM 2047
LR 00 to LR 15
HR 00 to HR 19
AR 00 to AR 23 (read area only)
TC 000 to TC 255
Section 6-3
Leftmost byte
Rightmost byte
Address range
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