11
6. Contents of the command
6.1 Notes on the setting command and reading command
• It is possible to set the setting value by the setting command of the communication function
even if the setting value is locked.
• Although the options are not applied, setting optional items is possible by the setting
command. However, they will not function.
• The memory can store up to 10,000,000 (ten million) entries.
If the number of setting times exceeds the limit, it cannot memorize the data. So frequent
transmission via communication is not recommended.
• When connecting plural slaves, the address (instrument number) must not be duplicated.
• When sending a command by Global address [95 (7FH)], the same command is sent to all the
slaves connected. However, a response will not be returned.
• The instrument number and data transfer rate of the slave cannot be set by communication.
Set them by the PC-900 front keypad.
Setting command
• The settable range is the same as the one that can be set with the keypad.
(Refer to the instruction manual for PC-900)
For communication command, refer to the Command table of this manual.
• All commands are composed of ASCII.
• The data (setting value, decimal) is converted to hexadecimal figures, and ASCII is used.
Negative numbers are represented by 2's complement. When the data (setting value) has
a decimal point, a whole number without a decimal point is used.
20H
20H
50H
31H
31H
31H
30H
30H
32H
35H
38H
0010 0000
0010 0000
0101 0000
0011 0001
0011 0001
0011 0001
0011 0000
0011 0000
0011 0010
0011 0101
0011 1000
+
10 0010 0010
[Hexadecimal]
[Binary]
1101 1101
1
+
1101 1110
D
E
44H
45H
[1's complement]
[2's complement]
[Hexadecimal]
[ASCII]
Checksum
STX
ETX
P
1
1
1
0
0
2
5
8
02H 20H 20H
50H 31H 31H 31H 30H 30H 32H 35H 38H
03H
[Characters above are represented by ASCII]
Checksum
Checksum calculation range
[e.g.]
D
44H 45H
E
