Specifications
Appendix 7 V-Link App7-7
Data Items for Protocols
• Transmission control code: 1 byte
• V7 port number: 2 bytes
Port numbers are used so that the host computer can identify each V7 series for access.
The data range is from 01H to 1FH (1 to 31) and is converted into the ASCII code before use.
The port number of the V7 series should be set on the V-SFT editor. (Refer to “V-SFT Setting.”)
• Command: 2 bytes
Available commands are shown below.
• The number of words to be read or written: 2 bytes
Set the number of words to be read or written by one command.
The data range is from 01H to FFH (1 to 255) and is converted into the ASCII code before use.
• Memory address to be read or written: 18 bytes
Specify the memory address to be accessed.
Set the following code in the format as shown for “Read target memory setting” on page App7-5
and “Write target memory setting” on page App7-6.
- Model
-Type
-Address
Specify the memory address to be accessed.
Signal Name Code (Hexadecimal) Contents
STX 02H Start of transmission block
ETX 03H End of transmission block
CR 0DH Carriage return
LF 0AH Line feed
Name Code (Hexadecimal) ASCII Contents
Read 20H 32 30 Read from memory
Write 21H 32 31 Write to memory
Code
(Hexadecimal)
ASCII
V7 series internal memory 00H 3030
PLC memory
0 to 65535 01H 3031
65536 and above 81H 3831
Memory card 02H 3032
Temperature control/PLC2 memory
0 to 65535 03H 3033
65536 and above 83H 3833
Type
Code
(Hexadecimal)
ASCII
V7 internal memory
$u (user memory) 00H 3030
$s (system memory) 01H 3031
$L (non-volatile word memory) 02H 3032
$LD (non-volatile double-word memory) 03H 3033
$T (temporary user memory) 04H 3034
PLC memory
Depends on the PLC to be used. Set the type number indicated for “Available
Memory” of respective PLCs on “Chapter 2” to “Chapter 33.”
Temperature control/
PLC2 memory
Depends on the PLC to be connected to the temperature controller and PLC2
function. Set the type number indicated for “Available Memory” of respective
temperature controllers on the Temperature Control Network Manual. Set the
type number indicated for “Available Memory” of respective PLCs on “Chapter 2”
to “Chapter 33” when using the PLC2Way function.