7-3
Section
Explicit Messages
100
Address L, Address H, Number of bytes (command):
Specify the leading PT memory address of the data and the number of bytes to
be read. Specify these parameters in 2-digit hexadecimal. Always specify and
even number of bytes to be read because an error will occur if an odd number is
specified.
Address L: The rightmost 2 digits of the leading PT memory address
Address H: The leftmost 2 digits of the leading PT memory address
The max. number of bytes that can be read at one time is 250 bytes (FA Hex).
When an OMRON Master is being used, the maximum is 240 bytes (F0 Hex).
Read data (response): The specified contents of PT memory are returned in
4-digit hexadecimal. The leftmost 2 digits (Data H) are first and the rightmost 2
digits (Data L) are second, as shown in the following diagram.
Leading address
Leading a 1
Leading a 2
Read data
0
1
0
2
1
3
1
4
2
5
2
6
01
02
13
14
25
26
7-3-3 PT Memory Read (L
→
H)
Reads the specified number of bytes of PT memory data beginning at the speci-
fied word address. The read data is returned with the low byte first and the high
byte second in the words.
Command Block
01
28
Class ID
Command
code
33
Service code
8A
00
Instance ID
01
00
Destination node address
Address L
Number of bytes
Address H
Response Block
01
28
Source node address
Service
code
No. of bytes
received
Response
code
Command
code
00
00
B3
Read data
Data L
Data H
Address L, Address H, Number of bytes (command):
Specify the leading PT memory address of the data and the number of bytes to
be read. Specify these parameters in 2-digit hexadecimal. Always specify and
even number of bytes to be read because an error will occur if an odd number is
specified.
Address L: The rightmost 2 digits of the leading PT memory address
Address H: The leftmost 2 digits of the leading PT memory address
The max. number of bytes that can be read at one time is 250 bytes (FA Hex).
When an OMRON Master is being used, the maximum is 240 bytes (F0 Hex).
Parameters
Parameters
